How do you think ITB's will fair In a cooler fall/spring climate like here in ohio?I'm aboslutely obsessed with NA cars...spent tons of money just to get my celica GTS to hit 200hp N/A anyways this is the way I'd like to go with the s2k,also when it comes to tunning how different is the apexi PFC from the AEM EMS? only shop that I've found so far is slowmotion performance and they've never done ITB's on a s2k before, but have tons of experience with the AEM EMS, as far as Installation goes i'm confident I can do it as I've worked with cars most of my teenage years,mostly vintage corvettes and mustangs, but do you think I should find a shop more knowledgeable with ITB tuning and if so any recommendations ,as I'm willing to get the car where it needs to be ,so it has a great tune.

 

The itbs in cold weather can be a pain to start. Injector Phasing setup on the AEM can help this a bit. I run alot of fuel at Idle and to 1500 rpm. I would not use anything other than AEM or a standalone that = or better. As far as finding places with Itb tuning experiance its very hard. I took my car to 2 different people to start out. Some poeple like to tune Via MAP sensor and some Tune Alpha N (Tps). My car is tuned by tps. For those tuning make sure Tps Based Fuel is on. Otherwise it seems the Ecu does not know where in the map it is because of the Tps signal. When we started out there were alot of bogging issues. That was cleaned up with due time as we started to tune the car. Since I am running a 12:0:1 piston my timing will be a bit lower than others running lower comprsesion. Using Raw knock valves to tune timing is a must. The tuner must understand how to use the internal data logging system. Mid range power is where the gains really come from. My top end power didnt raise that much but mid end power did. When it really comes down to it be ready to spend some time getting them right. Its also good to understand EFI systems. I have learned alot of watching the car be tuned and now can do alot of tuning myself. I would be happy to provide some start up maps that can be modified. I use 750cc injectors which are pretty big for the setup. Those running smaller injectors can then make a correction using the software. The power is basicly a on/off thing. Part throttle tuning takes along time and im not yet happy with it. There so much I could go on with on this subject but I will just answer questions from here on out. Its a great thing to give a shot if you know and can go through the process.

 

I am running a custom Hytech race header custom slip fit to a T1R 70mm single exit exhaust. My 50mm Jenvy setup is port matched to my head. I am also running Titanium dual valve springs and retainers. My cams are a beta of the new Hytech F20C NA cam with Toda cam gears. Most of my power is from the cams and the Jenvy's, they just work better then the TWM but you also have to pay twice as much. Of course, I am running the AEM ECU as there is no other cost effective standalone solution for the car as of yet.

I am selling my set of 50mm TWM ITBs with lower radiator pipe and carbon air horns ready to bolt on, they have 15 miles on them and are in perfect working order. I am selling them for 1,600 shipped with the lower radiator pipe (normally you would have to fabricate this).

 

I didnt realize that you were using a f22c...great to know that there is someone else who is running them.

are you a beta tester for the hytech cams? are they sponcering you in some way? would it be possible for myself to do the same? PM me any details...my car could be a great little seller for them

any thoughts as to what the same cams and the Jenvey's could perform using a stock header and a 2.5 custom exhaust, no cat? the 250 barrier achievable?

and taking your f22c to almost 9k...i thought that was a no-no becasue of the rod bolts and geometry, regardless of the head/valve/retainers...no?

Ryan

 

9 is fine for the F22C, any more then that and you will have serious longevity issues. The cams should by on sale by next month. Hytech is a very small company and does not do sponsorships. My vehicle was used for testing purposes because I was willing to pay for my parts and allow them the use of my vehicle for as long as is nessisary. You would certianly see significant gains in the powerband both at peak power and in massive torque increases throughout. I believe that through a 2.5 inch exhaust and a stock header 250 is possible, maybe even more. In all honesty the stock header is better then many aftermarket offerings and as good as the majority.

 

[QUOTE=MINES13,Feb 22 2007, 03:09 PM]


I am running a custom Hytech race header custom slip fit to a T1R 70mm single exit exhaust.

 

I would think cams, 70mm exhaust, no cat, stock header and cams tuned proper would net an honest 18-20hp but I can only speculate. My car baselined at 237hp, exactly what the factory quotes . With everything I am making exactly 38.5 hp over stock as of now. The big surprises are definitely in the torque numbers. We are making as much as 60lbft of torque over stock in some areas. As it sits the car pulls like a supercharged car only with much better transient response (engine accelration) due to the reduced pumping losses of the ITBs. I will be tweaking a few minor things I will cover later in the hopes of breaking 200lbft and 280hp. Keep in mind this is being done on stock valves, no real head work and a completely stock bottom end. The head has NEVER been removed from the block.

 

[QUOTE=MINES13,Feb 23 2007, 05:38 PM] I would think cams, 70mm exhaust, no cat, stock header and cams tuned proper would net an honest 18-20hp but I can only speculate.

 

theres an itb setup coming out soon, suppose to be straight plug and play system with the brackets and mounts. for those looking to get into itb's. i dont know much until i get a set in stock though and have the dynos to back them up

 

who makes them?