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Location:
Coalstoun Lakes
Registered:
November 2004
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7AFE + SC12 or SC14? Or Small Turbo
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Thu, 28 July 2005 12:13
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Now, I know I alreay have asked about this before but I never got all the answers I wanted. So here goes again 
I have a 97 AE102 Corolla Seca Conquest, with a 7AFE.
I'm considering supercharging it using either the 4AGZE S/C (SC12) or the larger SC14. I think both use an electric clutch so I'd use a Hobbs Vacumm switch to turn the S/C on/off.
I'll probably also get the Greddy E-Manage (piggy back ECU) for engine management, to handle the boost and such.
As far as I'm aware, the motor will handle 7psi stock, as that is what the turbo sportivo had.
What do I need to strengthen inside my motor to handle more than 7psi boost?
Crank, rods, and pistons? I was thinking of using 4AGZE pistons, what crank, and rods should I use? Where to get them from?
What injectors should I use?
Anything else I should consider/know?
[Updated on: Sun, 31 July 2005 01:55]
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Location:
Brisbane
Registered:
June 2003
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Re: 7AFE + SC12 or SC14?
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Thu, 28 July 2005 12:56
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You might have to re-think the 4agze pistons,
you'll also need custom mounting brakets made for the SC and more than likely the alternator.
You'll need to measure and make custom pulley wheel setup, belt clearances, belt lengths etc
You might have a bit of trouble sourcing 7afe performance internals - for the cost of custom bits and pieces I think its out of your budget
ever thought of just converting to a 4agze? little bit more work but theres always the choice of turbo / serious performance later on ...
I would budget atleast 3grand... its not as straight forward as you'd think
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Location:
Brisbane
Registered:
June 2003
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Re: 7AFE + SC12 or SC14?
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Thu, 28 July 2005 12:59
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Have you done the intake / exhaust side of things already ?
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Location:
Coalstoun Lakes
Registered:
November 2004
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Re: 7AFE + SC12 or SC14?
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Thu, 28 July 2005 23:52
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| boudan wrote on Thu, 28 July 2005 22:56 |
You might have to re-think the 4agze pistons,
you'll also need custom mounting brakets made for the SC and more than likely the alternator.
You'll need to measure and make custom pulley wheel setup, belt clearances, belt lengths etc
You might have a bit of trouble sourcing 7afe performance internals - for the cost of custom bits and pieces I think its out of your budget
ever thought of just converting to a 4agze? little bit more work but theres always the choice of turbo / serious performance later on ...
I would budget atleast 3grand... its not as straight forward as you'd think
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Why not use 4AGZE pistons? They will lower the compression, and they were what was suggested when I first asked.
Yeah I realise about the custom mounting of the supercharger and possibly alternator too. I have a mate (owner of Raptor SCs http://www.raptorsc.com.au ) who can help me with the mounting.
Yes, I know there isn't too much around in the way of 7AFE performance parts, but I'm sure there should be some?
I have thought of just converting to a 4agze, but if I could get my 7AFE strengthened up and SC'd I already have an extra 0.2L displacement, and also I don't have to go through all the trouble of doing an engine swap. Though if there is no way to get the 7AFE going good (without spending thousands of dollars), i might have to go that way.
So far budget includes:
SC12: ~$400
Greddy Emanage: $550
Fitting: ~$400
Hobbs Switch: ~$30
Boost Gauge: ~$100
Injectors: ???
And then also depending on how much it costs to strengthen the motor?
I could just run only 7psi, keep stock internals, and just use the above parts. How much power should that give me? It should increase the torque by a fair bit I guess?
| boudan wrote on Thu, 28 July 2005 22:59 |
Have you done the intake / exhaust side of things already ?
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No I haven't done anything yet. Why do you ask?
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Location:
Coalstoun Lakes
Registered:
November 2004
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Re: 7AFE + SC12 or SC14?
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Fri, 29 July 2005 12:23
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I was talking to Tim from Raptor SCs again tonight, he recons I'd be better off lowering the compression a bit.
He suggested raising the head 2.0mm and then wind up the boost a bit more.
How much more power would I get by doing this? and how much boost would it be able to handle by lowering the compression (i'm not sure how much by though)?
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Location:
nsw
Registered:
May 2003
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Re: 7AFE + SC12 or SC14?
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Fri, 29 July 2005 14:17
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Quite honestly i think that it would be way too much effort for little gain in the end. If your wanting more power in the form of forced induction, your better off using a small turbo, that way you dont have to worry about finding a place to mount the SC that lines up with the pulleys, or worry about activating the magnetic clutch. Just my opinion, but either way you would have to strengthen the bottom end somehow.
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Location:
Coalstoun Lakes
Registered:
November 2004
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Re: 7AFE + SC12 or SC14?
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Fri, 29 July 2005 22:47
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| tim123c wrote on Sat, 30 July 2005 00:17 |
Quite honestly i think that it would be way too much effort for little gain in the end. If your wanting more power in the form of forced induction, your better off using a small turbo, that way you dont have to worry about finding a place to mount the SC that lines up with the pulleys, or worry about activating the magnetic clutch. Just my opinion, but either way you would have to strengthen the bottom end somehow.
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Yeah, well that is also an option I guess.
I was reading http://www.turbofast.com.au/mr2.html and he only changed the pistons to 4AGZE pistons and then used custom rods but the standard crank, and was running 18psi, though its lower compression because of the 4AGZE pistons.
Do you think it would be feesable to build a 7AFTE, but using 4AGZE pistons and then stonger rods. I have heard the F head is not actually too bad for boosting. | Quote: |
The smaller valve angle could make boost come on at a lower rpm and will make more power for a given amount of air/fuel mixture burned.
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Source: http://www.corollaperformance.com/Mods/Engine/7AGE .html
Any idea where to get these custom ARGO rods?
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Location:
Coalstoun Lakes
Registered:
November 2004
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Re: 7AFE + SC12 or SC14?
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Sun, 31 July 2005 01:56
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bump
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Location:
narooma
Registered:
July 2004
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Re: 7AFE + SC12 or SC14? Or Small Turbo
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Sun, 31 July 2005 02:00
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i can sell you a perfect 2nd hand SC14 for under $400
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Location:
Coalstoun Lakes
Registered:
November 2004
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Re: 7AFE + SC12 or SC14? Or Small Turbo
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Thu, 04 August 2005 10:35
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Ok, I was thinking about it.
Could the motor handle 10psi without upgrading any internals? If so I might just run it at that and save the extra money for a body kit or something else 
Ok this is the plan so far:
turbo mainfold = B16/18 manifold (about $300 for manifold (off ebay))
turbo = TD04 or T25 (Is it possible to get a TD04 manifold for a B16/18?) ($550 brand new TD04)
ECU = Greedy Emanage? ($550)
Injectors =? What to use here?
Fuel Pump = ? What to use here?
Boost Controller =? (just a basic one so under $200 i think)
exhaust = 2.25" (i guess would need custom) ($???)
pod filter = K&N (about $80)
Boost Gauge = ?? (about $80-100)
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I Supported Toymods
Location:
Wollongong, NSW
Registered:
December 2003
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Re: 7AFE + SC12 or SC14? Or Small Turbo
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Thu, 04 August 2005 12:38
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Don't forget to factor a good tune into the budget there.
When I was looking at ways to beef up the 7A, the general theme I found was no more than 7psi and definately no higher than 6500rpm. I don't think the rods will take any more than that.
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Location:
Coalstoun Lakes
Registered:
November 2004
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Re: 7AFE + SC12 or SC14? Or Small Turbo
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Thu, 04 August 2005 12:45
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| Tats wrote on Thu, 04 August 2005 22:38 |
Don't forget to factor a good tune into the budget there.
When I was looking at ways to beef up the 7A, the general theme I found was no more than 7psi and definately no higher than 6500rpm. I don't think the rods will take any more than that.
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Yeah I tune as well
Well I've been askng on Twincam.org and 6th Gen Celica www.6gc.net ( http://www.6gc.net/index.php?action=howto&itu= 128 ) and it seems that the rods are fine for 15psi, but the pistons i think were only safe to 12psi.
And I'll be keeping the factory redline of 6250 (rev limiter at 6500).
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I Supported Toymods
Location:
Wollongong, NSW
Registered:
December 2003
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Re: 7AFE + SC12 or SC14? Or Small Turbo
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Thu, 04 August 2005 12:50
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The rods might hold up to boost better than they hold up to over-revving, but between them and the bearings, I think they're usually the first to let go. I've never heard anyone complaining about the pistons....
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Location:
Coalstoun Lakes
Registered:
November 2004
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Re: 7AFE + SC12 or SC14? Or Small Turbo
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Thu, 04 August 2005 12:56
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Strange, cause everyone on twincam.org and also club4ag.com have been saying that the pistons are weekest and the rods can handle up to 15psi stock?
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Location:
Coalstoun Lakes
Registered:
November 2004
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Re: 7AFE + SC12 or SC14? Or Small Turbo
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Fri, 05 August 2005 03:58
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bump, come on, where are all the knowledable people? I know you are there somewhere.
Simply questions: Can the 7AFE handle 10psi with a decent tune, ie profesionally dyno tuned?
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Location:
brisvegas
Registered:
August 2004
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Re: 7AFE + SC12 or SC14? Or Small Turbo
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Fri, 05 August 2005 04:24
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i have heard of stock 4age's getting round with 10 psi easy..adn they run a decent amount more comp than the 7a..
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Location:
Coalstoun Lakes
Registered:
November 2004
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Re: 7AFE + SC12 or SC14? Or Small Turbo
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Fri, 05 August 2005 04:33
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| drift86levin wrote on Fri, 05 August 2005 14:24 |
i have heard of stock 4age's getting round with 10 psi easy..adn they run a decent amount more comp than the 7a..
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True but the 4AGE is known to be stronger than the 7AFE, cause its just stronger and cause it has shorter rods.
I have read of the 7AFE running at 12psi ok, but I want to make sure first that it will be safe to run at 10psi
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Location:
brisvegas
Registered:
August 2004
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Re: 7AFE + SC12 or SC14? Or Small Turbo
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Fri, 05 August 2005 04:36
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but one person might say yes or no..and your engine might have more/less km's on it etc etc..there are heaps of variables..ppl will just say 'in theory it should be fine' but the only way to find out will be to actually do it to your motor..there not expensive to replace anyway..almost any engine can handle 7-8psi..
i didn't think it was possible to run 28psi on an internally stock 4AGZE (changed to turbo) but boy was i convince real quick!!
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Location:
brisvegas
Registered:
August 2004
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Re: 7AFE + SC12 or SC14? Or Small Turbo
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Fri, 05 August 2005 04:38
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speak to sprinterman68..i spoke with him last night..and he is running some farking crazy 4age/7age turbo monster 12 sec hybrid animals..
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Location:
Baulkham Hills, Sydney
Registered:
September 2004
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Re: 7AFE + SC12 or SC14? Or Small Turbo
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Sat, 06 August 2005 03:18
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like i said on SRC birdie....
blacktop 20v 7agtze 
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