4g93t engine forge build help and suggestions?
- Thread starter svanh1993
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caged
Well-Known Member
Its pretty good. 2000cc injectors on 98 are shit house though, but by the time you setup with speed density and flex it gets expensive and a link g4 or haltech starts looking like an atractive option.
mike_92gsr
Active Member
Yea im still in the unknown with that as i am just running the standard 560cc injectors until i put the new engine in. I have seen good results with bigger injectors though.
caged
Well-Known Member
Depends on turbo and how well everything else is setup.
svanh1993
Well-Known Member
Mine will still be streetable looking at a weekend car i guess you can say
Looking at doing a few bits and pieces
Fuel pump is a must of an upgrade old fuel pump may be on its way out so looking for a walbro 440lph highflow pump
Cams are still in mind on 260-270 cams with 10mm lift
Looking at making my self a split pulse type manifold maybe a highmount to fit the turbo between the head and the gearbox and the radiator just wondering if i should stay gt2871 current setup with the forged internals and higer lifting cams or to go a gt3037 with a smaller rear housing solit pulse like the ar. 63 and. 70 front
Will be looking at setting up an lsd for the fwd gearbox unsure of what path ill take on it and what cvs will handel the power goal
Looking at doing a few bits and pieces
Fuel pump is a must of an upgrade old fuel pump may be on its way out so looking for a walbro 440lph highflow pump
Cams are still in mind on 260-270 cams with 10mm lift
Looking at making my self a split pulse type manifold maybe a highmount to fit the turbo between the head and the gearbox and the radiator just wondering if i should stay gt2871 current setup with the forged internals and higer lifting cams or to go a gt3037 with a smaller rear housing solit pulse like the ar. 63 and. 70 front
Will be looking at setting up an lsd for the fwd gearbox unsure of what path ill take on it and what cvs will handel the power goal
Cranked
Donating Members
290s are fuckin huge! I wouldn't go over 272. Even then there are some mix match combos 272 ex, 264 in.
Yep, hence the drag car reference. I hated those cams.
On the street I like stock cams on the 93, with the small displacement of the 1.8 cams aren't ever really going to help you with responsiveness. And with a big turbo responsiveness will already be an issue.
On the street I like stock cams on the 93, with the small displacement of the 1.8 cams aren't ever really going to help you with responsiveness. And with a big turbo responsiveness will already be an issue.
svanh1993
Well-Known Member
Think its worth getting cams then i was only looking at 270in and 260exhaust 10mm lift for both sides whags going to be the difference atm my setup is runing stock cams and a gt2871 13psi and higher compression pistons on the 4g93p motor fullboost was on 3500ish all the way to redline positive boost around 1800rpm nlw im looking at going to a gt3037 or 3071 looking at split. pulse just wondering if i can make it fit with my thick evo alloy radiator atm space is close to limmited so unsure if top mount will be the way to go and how much lazier the bigger turbos will be to my 2871 i was thinking the cams might make the big turbos work abit better earlier and get simular boost come on around 3500-4000ish with the big turbo
svanh1993
Well-Known Member
Will be looking at around 22psi range threw the gt30 on the new low compression forge build
To give you a comparison I'm running a td05 20g (significantly smaller than a gt30), on 25psi with the benefit of E85 and advanced timing, and its still a little laggy for my liking.
With the 290/290 cams it was horrible.
With the 290/290 cams it was horrible.
svanh1993
Well-Known Member
What cams are you running now vin? Make much of a difference changing back?
What lift were the high cams and where did it feel like the power came on
What lift were the high cams and where did it feel like the power came on
I've gone back to stock GTi profile cams in a ported GSR head.
The 290s were 11.1mm lift and had absolutely zero power below 4,500 rpm, to the point where if I came to an intersection and was turning to then go up a hill, I'd need to shift down to first gear to have any chance of the car turning the corner and going up the hill. And occasionally it would stall in that situation.
When the power came on and the turbo spooled up, sure it made incredible power for 3,000rpm, but then it was time to shift again and you'd always have a bit of lag in the next gear so repeated the process. It was incredibly frustrating to drive.
Below is a video of my first drive with that setup, where I'm literally foot to the floor the whole way. You can see how laggy the motor was...
http://s13.photobuck...bfef58.mp4.html
The 290s were 11.1mm lift and had absolutely zero power below 4,500 rpm, to the point where if I came to an intersection and was turning to then go up a hill, I'd need to shift down to first gear to have any chance of the car turning the corner and going up the hill. And occasionally it would stall in that situation.
When the power came on and the turbo spooled up, sure it made incredible power for 3,000rpm, but then it was time to shift again and you'd always have a bit of lag in the next gear so repeated the process. It was incredibly frustrating to drive.
Below is a video of my first drive with that setup, where I'm literally foot to the floor the whole way. You can see how laggy the motor was...
http://s13.photobuck...bfef58.mp4.html
khubner1
Moderator
laggy mc lag stuffVIN18M said:
Don't get me wrong, with those cams you could rev to 8k and still be making power, but I was pretty conservative as it was a new engine and I wanted to prolong the life of it for as long as I could.bj said:4500 to 7500 power range?
would probably need 8000-8500 so is doesn't fall out of boost after gear change.
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