Building an SR20det for 550-600 hp

[PLAYA]

I have rang up about sleeving the block, i have to measure the exact size of it to see what they have there but it is pretty cheap to re sleeve it. Im going to see the thickest sleeve i can fit in it.

Also a place was looking to get billet rocker arms made up but they would be about $50 each but you have to get 500 made up at a time. This would then mean it would be good to go for like 9,000 rpm

[de_rift]

you could just swap over to the GTiR valve gear couldn't you?

[intehnet]

paul:

knife edging a crank is sharpening the edge of the crank so it glides through the oil better with less resistance at higher speeds


(correct me if i'm wrong)

[C-Red]

Rods - absolutely ; Sleeves - no. According to an ex Nismo Engineer (Mike Kojima) the main problem with SRs at extreme power levels is keeping the head on. Blocks start to get marginal at 700ish but if you've got full wall thickness on the standard block it isnt an issue. You will need to convert to a solid top end if you want it to rev hard at high boost. It also allows smaller cams to be run for the same at valve lift.
We're aiming to see exactly what an SR block will take, its only at 360ish rwhp at the moment, but we're aiming for 450ish without the gas.
Jash

[KB]

Try and get an entire GTiR motor, the block, rods, crank are all better as is the head, ports and valve gear.

Only problem is trying to get the intake to fit under the bonnet.

[Swifty GTi]

Originally posted by KB
Try and get an entire GTiR motor, the block, rods, crank are all better as is the head, ports and valve gear.

Only problem is trying to get the intake to fit under the bonnet.

that and the fact the engine is facing the wrong (i mean right) way :D

[C-Red]

Originally posted by Swifty GTi
that and the fact the engine is facing the wrong (i mean right) way :D

The right way for cheap production yeah...:p
Jash

[Swifty GTi]

not my fault you north-south SR owners got the pov-pack SR :p

(long live the GTI-R SR20DET :D)

[Zac]

What gearbox do people use on a rotated gti-r donk?

[Swifty GTi]

ok here's one we prepared earlier :p

this gti-r is making 547hp or 270kw at all 4

(ingore the 12.30, it bettered that by about 1 second a few months ago)

http://gtiroz.onthenet.com.au/gallery/album04



there was a list of mods up to get that figure around here somewhere - i'll try find it and post it, it might help :D

[nismoracing]

Re: Building an SR20det for 550-600 hp

Originally posted by PLAYA
BOTTOM END
-standard crank - fully prepared (crack tested, ground what ever needs to be done)
-standard rods - polished shot peened what ever needs to be done here also
-Forged pistons and apropriate rings
-ARP rod bolts head studs etc through out
-ACL race series bearings
-Block decked honed what evers needed
-new oil pump, water pump etc
-trust sump

The only problems I see here is rods. Go some aftermarket rods, Eagle are making H-Beam rods at the moment and they are going for around $800 a set.

TOPEND
-HKS S2 cams 272 degree and 10.5 mm lift
-HKS ajustable cam gears inlet and exaust
-HKS metal head gasket
-HKS valve springs
-lifters - do i change to solid lifters?
-porting - how much is needed
-valve guides - do they need to be replaced
-are standard valves good enough
-is inlet manifold a restriction, can i port this or is a custom one better? is the Greddy one any good? is standard throttle body too small? what is best upgrade?

More lift from the cams would be good, HKS of the shelf items go up to 11.5mm. Solid lifters, oh yes, because you will need revs to get the HP you want.

rest of the running gear already is
-Autronic SMC
-FMIC
-blitz 850 cc injectors
-bosch 044 pump (will this be big enough)
-remote oil filter and cooler(cooler not installed yet)
-high mount manifold
-garrett GT30 (.7 front, .86 rear)
-turbo smart 45 mm gate
-3 inch exuast and gate venting to atmo

850cc injectors will get you around 612hp at the flywheel at 90% duty cycle. The pump could handle the application, but at this power level surely a surge tank setup and new lines would be in order.

The Garrett GT30 you specify would more than likely not rise to your expectations if you are talking RWHP. Not sure if it will support that much HP at the fly either.

Best of luck!

[PLAYA]

after speaking to my engine builder i will be running gas for what ever i need over what the turbo will produce to make the 600 hp. And thats 600 hp fly wheel 600 wheels is just crazy!