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Location:
Sydney
Registered:
August 2003
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4AGE 88kw with 100kw bottom end ??
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Mon, 01 December 2003 19:36
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heyz i currently have an 88kw 4age and was wondering if it is possible to drop a 100kw bottom end and still leave the TVIS active ... i have heared of such ideas a few times but i dont know if this actually works and how it goes on performance vs. maintenance cost ...
would this also be a big job converting ?? or would it be relatively easy for a mechanic to do ?? coz my head gasket is about to go and my rings are worn out and i think it would be cheaper for me to just do this ...
one more thing ... id still have to get my engine number changed if i decide to do this right ??
any tips are appreciated ...
cheers ...
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Location:
Canberra
Registered:
May 2002
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Re: 4AGE 88kw with 100kw bottom end ??
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Mon, 01 December 2003 21:15
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Yes, you would need the engine number changed, as its stamped into the engine block.
The bigport head will bolt up to the 100kw block, with the TVIS manifold, but what computer would you use? You'd need to block the return hole in the 100kw block that is meant to be connected to an external oil drain on the 100kw head, which you obviously wont have with the old head.
Cheers
Phil
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Location:
Melbourne
Registered:
May 2002
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Re: 4AGE 88kw with 100kw bottom end ??
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Mon, 01 December 2003 21:32
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this is an easy mod, and works very well. you use the 86kw ecu. you get a lot more mid-range torque, but run out of puff at top (fixed with slightly larger cams)
easy to update the engine number with the rego authorities.
T
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Location:
W.A.
Registered:
October 2002
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Re: 4AGE 88kw with 100kw bottom end ??
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Tue, 02 December 2003 02:52
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what kinda cams do you recommend? intake & exhaust ?
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Location:
Sydney
Registered:
May 2002
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Re: 4AGE 88kw with 100kw bottom end ??
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Tue, 02 December 2003 03:30
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Max is 264 DEG with stock computer,
Ben
AE86 Trueno 4AGE
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Club Member
Location:
sydney
Registered:
May 2002
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Re: 4AGE 88kw with 100kw bottom end ??
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Tue, 02 December 2003 05:12
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264 or 272 depending on what you read and who you believe "shrugs"
oh and thats with standard lift.. if you start changing the lift then its another kettle of fish
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Location:
Sydney
Registered:
August 2003
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Re: 4AGE 88kw with 100kw bottom end ??
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Tue, 02 December 2003 07:39
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so how well would this actually go against the 20v and the 100kw on performance vs maintenance and cost ??
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Location:
Sydney
Registered:
May 2002
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Re: 4AGE 88kw with 100kw bottom end ??
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Tue, 02 December 2003 11:03
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(Sorry for thread hijack)
Hi Michael
I am going to have to try this out just to prove once and for all if it can be done or not.
I will try the 272 Deg first, if it works, ill keep em in my engine and if they dont i will sell them here..
Ben
AE86 Trueno 4AGE
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Location:
Sydney
Registered:
August 2003
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Re: 4AGE 88kw with 100kw bottom end ??
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Tue, 02 December 2003 16:39
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by the way 1 more thing ?? will i have to do the wiring and loom again if i decide to do this ?? or would this be a total straight bolt on besides the TVIS head ??
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I supported Toymods
Location:
melbourne.victoria.austra...
Registered:
June 2002
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Banned user
Location:
ADELAIDE - The Drift City
Registered:
July 2002
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Re: 4AGE 88kw with 100kw bottom end ??
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Tue, 02 December 2003 23:45
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Im running a small port 100kw motor with a bigport ECU, thinking about chucking in some Bigport cams in there since they are slightly different from stock
worth doing?
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Location:
Melbourne
Registered:
May 2002
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Re: 4AGE 88kw with 100kw bottom end ??
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Tue, 02 December 2003 23:49
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smallport cams are 230 duration.
bigport cams, from ae86 or aw11 ONLY (!!) are 240 duration. fwd corolla type motor is 230.
worth about 5kw apparently (only .1 more lift)
T
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Location:
Canberra
Registered:
May 2002
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Re: 4AGE 88kw with 100kw bottom end ??
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Wed, 03 December 2003 09:41
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bigport cams, from ae86 or aw11 ONLY (!!) are 240 duration. fwd corolla type motor is 230
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Really? There's gonna be a few disappointed people out there who have sought "bigport" cams thinking they are 240 duration... Glad mine are actually from an AE86 import motor 
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Location:
W.A.
Registered:
October 2002
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Re: 4AGE 88kw with 100kw bottom end ??
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Wed, 03 December 2003 11:30
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so T what cams are u running in ure blueop head/redtop bottom config? and what lift are they??
are u still running the std. ecu?
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Location:
Melbourne
Registered:
May 2002
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Re: 4AGE 88kw with 100kw bottom end ??
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Wed, 03 December 2003 21:56
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that car was sold some time ago (currently building up a 3sge t-bar aw11)
it ran 240's, modified blacktop extractors and 2.5" exhaust (a bit loud) but boy did it go!! had heaps more mid-range than my sx, but the sx had more go up top (hence the need for bigger cams)
T
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Location:
Sydney
Registered:
August 2003
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Re: 4AGE 88kw with 100kw bottom end ??
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Thu, 04 December 2003 22:38
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okies i have spoken to a mechanic that does toyota only ... he seems to have a very good knowledge and reputation about toyota but he told me that this is not possible due to the redtop being a diff engine to the bluetop ... i dont know if his lying or just doesnt know of this setup since most of you would agree that this can be done fairly easily ... so now i dont know what to do coz my head gasket is going worser and worser and i need to make a quick decision ... if anyone out there know anyone who does this sort of service for a reasonable price please let me know as i will be needing to do this conversion or itz going to be a replacement for a new head gasket which will cost pretty alot ...
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Location:
Terrigal
Registered:
May 2002
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Re: 4AGE 88kw with 100kw bottom end ??
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Thu, 04 December 2003 23:10
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I'd be more inclined to listen to people on here who have had first hand experience than a mechanic.
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Location:
Sydney
Registered:
August 2003
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Re: 4AGE 88kw with 100kw bottom end ??
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Thu, 04 December 2003 23:18
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thatz what i mean dude ... id rather someone whos actually done this before than someone who hasnt even heared of this kind of setup ...
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Location:
Melbourne
Registered:
May 2002
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Re: 4AGE 88kw with 100kw bottom end ??
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Fri, 05 December 2003 02:31
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it does go together - i should know!! the block is basically the same (minor casting differences due to the 100kw being the later 7 rib block) the heads all interchange.
T
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Club Member
Location:
sydney
Registered:
May 2002
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Location:
Sydney
Registered:
May 2002
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Re: 4AGE 88kw with 100kw bottom end ??
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Fri, 05 December 2003 09:19
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Yeah i already knew the 262 would work, its just the 274 that everyone seems unsure about. Although by my calculations my 86KW injectors may not be enough and the engine will run way too lean, and the only other injectors i have at the moment are GZE ones which wont work with my Bigpot computer.
Is that engine Sams by any chance ??
As for the MSquirt the car is here any time you need it id be up to try that.
Cheers
Ben.
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Club Member
Location:
sydney
Registered:
May 2002
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Re: 4AGE 88kw with 100kw bottom end ??
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Fri, 05 December 2003 09:23
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Yeah Sams car
I sent you a PM on the MS
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