| Author | Topic |
|---|
Location:
Newcastle
Registered:
March 2003
|
|
20 valve turbo
|
Thu, 01 May 2003 03:42
|
 |
Hi all
What are your thoughts on a 4age 20 valve silver top runing a 1.5MM shimmer in the head to lower comp, 10psi boost and all on standard computer. How long will this last? what are your thoughts?
|
|
|
Location:
Montrose, VIC
Registered:
May 2002
|
|
Re: 20 valve turbo
|
Thu, 01 May 2003 05:15
|
|
Anyone here good at maths?
20v 4ag+standard computer+standard injectors+10psi=horrendous crunching sounds 
|
|
|
Location:
GoldCoast/Brisbane
Registered:
May 2002
|
|
Re: 20 valve turbo
|
Thu, 01 May 2003 07:14
|
|
| mrshin wrote on Thu, 01 May 2003 15:15 |
Anyone here good at maths?
20v 4ag+standard computer+standard injectors+10psi=horrendous crunching sounds
|
 hehe
Yeah bad idea..... if you want a turbo 20V do it right and with a GZE block!
If this is not possible .... well like Tony SOPRANO would say...
"FO'GEHRABOUIT!"
|
|
|
Location:
Newcastle
Registered:
March 2003
|
|
Re: 20 valve turbo
|
Thu, 01 May 2003 08:54
|
|
|
Hahaha well weah that was my reaction to, but i know of someone who is running it, for about 2 days now so i guess well see what happens, and on the comment about using a gze bottem end what is wrong with a 20v bottom end if only running low boost (15psi) i know sam ran 35psi on a gze, so a 20v should handle 15psi no probs, it is semi forged is it not.
|
|
|
Toymods Board Member
I supported Toymods
Location:
Turramurra, Sydney.
Registered:
May 2002
|
|
Re: 20 valve turbo
|
Thu, 01 May 2003 09:04
|
|
15psi is generally not considered low boost. Low boost is more like 6-7psi.
Out of interest a guy from my work has a 20V with low comp forged pistons, in a rolla but set up with the standard 20v induction (to temporarily have it running) in an AE82, which also has a few other goodies in it, with a bunch of spares, & is looking to sell it for around 3 grand.
This is what you need to boost a 20v.
|
|
|
Location:
Brisbane
Registered:
May 2002
|
|
Re: 20 valve turbo
|
Thu, 01 May 2003 09:15
|
|
LOL if low boost is 15psi WTF is high boost!  
On a Pretty damm highly tuned NA motor to start with 15psi (ok i know its got a decomp plate but still!) on the stock ECU sounds like trouble to me!
Cheers
Wilbo
|
|
|
Location:
Adelaide
Registered:
May 2002
|
|
Re: 20 valve turbo
|
Thu, 01 May 2003 09:22
|
|
Covered many times before, so frankly i cant be arsed.
Just build it properly (4AGZE basis) and leave the well made N/A motor to someone who wont destroy it with hairbrain plans.
|
|
|
Location:
Newcastle
Registered:
March 2003
|
|
Re: 20 valve turbo
|
Thu, 01 May 2003 09:28
|
|
Ok for starters, if i was doing it i world run an after market ecu, and i was refering to 15psi being low boost as aposed to 35psi, i know its not low but it is a farly strong motor and should take it.
also in relation to BigWorm, i would be looking at turboing it over a period of time, so i didnt have a lump sum if u know what i mean, im going to start by making the headers, if they work then i'll go from there, if not i'll start saving.
|
|
|
Location:
Montrose, VIC
Registered:
May 2002
|
|
Re: 20 valve turbo
|
Thu, 01 May 2003 12:12
|
|
|
I'd say that a 20v would survive, say, 10psi boost from a moderate sized turbo and record a good increase from doing so, but NOT with factory mapping/fuel system!
|
|
|
Toymods Board Member
I supported Toymods
Location:
Turramurra, Sydney.
Registered:
May 2002
|
|
Re: 20 valve turbo
|
Thu, 01 May 2003 13:15
|
|
|
Hey, I just reckon that turboing a 20v without a properly setup system could end up costing more than the average lump sum. Better to take your time & do it half decently & never have to find out how much it might cost if things go BANG.
|
|
|
Location:
GoldCoast/Brisbane
Registered:
May 2002
|
|
Re: 20 valve turbo
|
Thu, 01 May 2003 13:20
|
|
| neat 20valve wrote on Thu, 01 May 2003 19:28 |
Ok for starters, if i was doing it i world run an after market ecu, and i was refering to 15psi being low boost as aposed to 35psi, i know its not low but it is a farly strong motor and should take it.
also in relation to BigWorm, i would be looking at turboing it over a period of time, so i didnt have a lump sum if u know what i mean, im going to start by making the headers, if they work then i'll go from there, if not i'll start saving.
|
Dude this is just my opinion ok so don't take offence, if you are on the build of a turbo 20V "over a period of time" why waste time and more importantly money building a package that in my eyes is still a TIMEBOMB even with aftermarket management??
I still think that the bottom end of a 20V is not strong enough for PROLONGED forced induction at the mentioned 10psi!!
Can anyone prove me other wise??
Man do things right the first time round!! GZE bottom end!
I don't wanna hear you say the old classic
"Money is not an issue!" If moeny isn't an issue go get yourself a Stutgart Special!
B-side ya!
SPEEDCORE!
|
|
|
Location:
Newcastle
Registered:
March 2003
|
|
Re: 20 valve turbo
|
Thu, 01 May 2003 21:53
|
|
Thanks for all your help guys, i would build it proply, but like i said, over a period of time, meaning, buying things here and there and putting it all in at once, i think bigwork miss understood me there. if u all say a 20v bottom end will not hold up to it than i will have to be sure it will, other wise it will be a gze bottom end and box with 20v head.
once again thanks to all of ya for help,
Craig.
|
|
|
Registered:
May 2002
|
|
Re: 20 valve turbo
|
Thu, 01 May 2003 22:48
|
|
O.K, bearing in mind that I'm a layman at this, (particularly turbos etc  ), how about the following combo...
GZE Block and crank.
GZE Con-rods
20V pistons
20V head with spacer (for, say, an 8.5-9.0 static compression ratio)
ITBs
*insert appropriately large single turbo here*
Autronic ECU (some bias showing thru here!)
Oh, and a W58 box...(Providing it is "strong" enough - You know what I mean!  )
Would that "make" a decent 20V turbo, or have I missed something? (FMIC, perhaps?)
|
|
|
I supported Toymods
Location:
Perth
Registered:
May 2002
|
|
Re: 20 valve turbo
|
Fri, 02 May 2003 00:39
|
|
Would you be able to get away with using just the whole GZE block and pistons (being ceramic coated and forged), or will it have issues with clearance.
Personally, I'm of the belief you can get a lot done even with higher compression providing your tuning is good and you have the right support systems. There is a Honda S2000 here in Perth with Lancer Evo 5 intercooler and TD06 turbo, its making a whack of power and is reliable as because its tuned well, something to think about.
|
|
|
I supported Toymods
Location:
south of the big smoke
Registered:
May 2002
|
|
Re: 20 valve turbo
|
Fri, 02 May 2003 01:00
|
|
there wouldnt be a problem with clearance cause the gze pistons are dished,
biased99: ya wouldnt use the pistons from a 20v cause ya compression ratio would be to high and plus they aren`t as strong as the gze no ceramic coating etc!
with all the stuffing around with the 20v head wouldnt it be more feasable in just using the bigport 86kw head? if set up correctly is capable of 200rwkw if that aint enuff simple just build a 3sgte!
|
|
|
Location:
New Zealand
Registered:
May 2002
|
|
|
Registered:
May 2002
|
|
Re: 20 valve turbo
|
Fri, 02 May 2003 01:27
|
|
|
Errr...won't there be issues with the valve-cutouts using a GZE piston with 20-valve head?
|
|
|
I supported Toymods
Location:
south of the big smoke
Registered:
May 2002
|
|
Re: 20 valve turbo
|
Fri, 02 May 2003 01:35
|
|
|
not as far as i know cause they are dished ill try find a picture to show ya
|
|
|
Registered:
January 2003
|
|
Re: 20 valve turbo
|
Thu, 21 August 2003 11:05
|
|
hey..
well its time time to add my two cents worth..
anyone who knows the purple crolla "DROOLN" knows the car... and if u dont well u dont.. anyways.. i am very good friends with the guy who built that engine.. its a blacktop 20v turbo.. now its runnin... 6psi(i think or maybe 10) but anyways its got completely stock... yes read COMPLETELY STOCK!!! well anyways.. yea/... it also only has a microtech digi1  .. front mount three inch exhaust and a custom intake manifold thingy:P anyways.. that thing makes over 200 hp at the wheels easy and has ran a mid 13 quarter mile on street tires whilst wheelspinning through completely through 1st 2nd and 3rd gears... and yea.. oh and over the 3 years that he has had the engine in the car only 1 thing has gone bang.... and wait for it ... wait for it.. who can guess wat it was??? the turbo blew.. bet you's didnt expect thatt answer hey..
well anyways.. all you ppl who doubt 20v turbos.. here's somthing to think about anyways catch yas all later...
chris
|
|
|
Re: 20 valve turbo