6 cylinders & 2 turbos, for now

[Halon]

Sweet!!

[C3L1CA]

Looks really good!

[95talonracer]

nope they are S1's. The torque curve tested back to back on a similar supra was way higher and way sooner on the power band and that's what I wanted. S2s are for higher rev higher higher hp with bigger turbos and this s1 will help the streetability alot. I'll post links later.

[scheides]

Comparos would be cool to see for sure! S1's are great cams too for sure...sorry with the awesome idle control and mivec of the X I just get wrapped into the mentality of 'go big or go home' on cams and forget that a milder cam is still a fantastic choice for a lot of cars.

Specs on the S1's look dandy!

[goodhart]

I know you were telling me certain cams on the 2JZ's make it interference, will these S1's have enough lift to do that?

[95talonracer]

Here is the cam test that was done.

http://www.supraforums.com/forum/sho...-S2-vs-HKS-272

Here is copy paste from the link

Camshaft test GSC S1 and S2 vs HKS 272

Camshaft test GSC S1 and S2 vs HKS 272


Test Mule:
94 6spd mkiv
stock long block 2JZGTE
stock intake manifold
GSC Single Spring Valve Spring using stock retainers
Titan Cam Gears
Precision 67MM Turbo .81 Exhaust housing (Journal Bearing)
HKS Header and 50mm Wastegate.
3” DP and Mid Pipe
Greddy 4 Row
AEM EMS with HKS DLI
HKS Ti 4" exhaust

Fuel:
C12 (same 10 Gallons was used for all testing)

Dyno:
DynoJet 224X 2wd dyno

Boost:
24psi tapering to 22psi (this was consistent with all the camshafts)

Timing and Fuel:
Timing was the same for all camshafts. i did not adjust the timing table I only verified the base timing off the crank and the AEM EMS after each cam install.
Fuel was set to 11.6AFR under boost and was consistent with all camshaft sets.
A new set of NGK 6097s which were gapped at .024” were installed for the test.

Degreeing in camshafts and Valve Clearance:
The HKS Camshafts call for a .008” intake and .010” exhaust clearance (this was set across the board correctly)
GSC camshafts use a looser clearance of .010”intake and .012” exhaust (this was set across the board correctly)

Each set of camshafts were degree’d to the manufactures specs exactly…
HKS 272: 114 Intake , 114 Exhaust
GSC S1: 107 Intake , 116 Exhaust
GSC S2: 110 Intake , 120 Exhaust



HKS 272 VS GSC S1:

HKS 272 (Green) vs GSC S1 (red) HP Only

HKS 272 (Green) vs GSC S1 (red) TQ Only

HKS 272 VS GSC S2:

HKS 272 (Green) vs GSC S2 (Blue) HP Only

HKS 272 (Green) vs GSC S2 (Blue) TQ Only

GSC S1 VS GSC S2:

GSC S1 (red) vs GSC S2 (Blue) HP Only


GSC S1 (red) vs GSC S2 (Blue) TQ Only

All Three Together:
GSC S1 (red) vs GSC S2 (Blue) vs HKS 272 (Green) HP Only

GSC S1 (red) vs GSC S2 (Blue) vs HKS 272 (Green) TQ Only

[scheides]

Wow, amazing results! Thanks for sharing. The S1's are the obvious choice in from that comparo IMHO, although you gotta wonder what an aftermarket intake manifold would do to that test.

Good data, you'll have a phat powerband no matter what!

[95talonracer]

yes the 2jz stock is a non interference motor but becomes interference once internals or cams are changed. I have tryed to find out the exact point where the motor becomes interference and all i found which was not 100% verified was a cam larger then a 264. Also things like different pistons and valves will change it as well. since the GSC S1's are about a 269, I have custom 9.5:1 pistons and 1mm oversized valves I am guessing that it is now an interference motor. That is why I got a billet Stainless steel timing tensioner, gates racing timing belt and ALL new timing components. Us 4g63 guys run with the interference motors every day so whats new right?

[95talonracer]

Originally Posted by scheides

Wow, amazing results! Thanks for sharing. The S1's are the obvious choice in from that comparo IMHO, although you gotta wonder what an aftermarket intake manifold would do to that test.

Good data, you'll have a phat powerband no matter what!

My goal which was choosen backed by hours of research is to have the powerband as far down low as possible to make a kick ass street car that also puts down over 800hp. The combo of the 9.5:1 pistons, all coated parts including ceramic and oil shed, The GSC S1 cams instead of S2's, and a "small" turbo (6765). I am also going to keep the stock intake and have MAP port it. there are guys runung over 1k hp on the stock intake and TB.

[95talonracer]

Got my modded oil pump by Sound Performance thanks to MAP!




It starts as an OEM Toyota oil pump. This is from SP's website.

This includes a new Toyota oil pump. We then take that and modify to increase pressure and prevent the front main seal from blowing out.

What is done to it?
We shim the main pressure spring
Drill a larger return hole
Drill and tap 3 set screws to hold front main seal in
Shorten (tighten) main seal spring

I guess there are problems blowing off the main seal under high HP. Not no more

[Halon]

Looks like you made the right choice in cams to me. And good call sticking with the stock TB, but that may cause some uproar from the Evo X folks !!! I keed I keed

Thumbs up for doing your research and picking your setup based on your goals!

[scheides]

^LOL! A quick search shows that the stock mkiv supra TB is ~65mm...ironically the size we are all gunning for w/ these ported stockers I approve!

[turbotalon1g]

no 75mm TB no care.

[Shane@DBPerformance]

The stock intake manifold sucks at making top end power anyways, so no need for big TB or big cams. Most Supras pretty much run the pussiest aftermarket cams known to man, how often do you hear one actually loping... They used to be all scared to run anything with any lift because it makes them into an interference engine, then they would actually have to replace the timing belt and tensioner before they just break from old age.

[95talonracer]

^

[95talonracer]

Maybe all 2jz owners should own a dsm first to realize that interference is no big deal!

[turbotalon1g]

I am a DSM owner and I think it is a big deal.

[95talonracer]

Just keep up on the timing components and use quality parts. Simple as that right Aaron?

[turbotalon1g]

Its the truth. But it would be nice to have the option to be a lazy piece of crap and have no consequence.

So now that we are past that, and the fact you are running pussy cams and no big TB.

What are you hoping for on the dyno?
Being auto I don't see you needing too much over 600-650 to hit a 9 and I know that turbo on a supra will do over 800whp all day.

Have you done any trans work?

[95talonracer]

I'll be sending the trans out next. I'm planning on 700 minimum but otherwise 800+ would be kind of nice too. I don't see a pro lem hitting any of the numbers really.