Well i know for a FACT they arent causing a power problem.. Funny thing is where they make the power is where he is losing power.. I know they are lazier so that will contribute part to spool but there is no MAGIC cam.. you want big lift and top end power you give up low end.. That turbo doesnt make power where the S3 makes the most anyway so its a poor choice in cam for the turbo.. but where its dropping off it should be climbing with that cam..

Mike

 

we checked the reluctor. i dont know where else to look for problems? valve float seems to be a possibility still. perhaps these are not S3's? or maybe these are the ones designed for solid lifters? GSC is f'ing impossible to get in touch with.i have left two messages. there answering machine indicates they are on the other line. i'm rather annoyed with them...

 

i agree with you 100%. s3's are a great cam for 800+ hp. this car isnt going to be in that power range so the cam is useless. And im ment to quote s3s because its what a seller said they were, they can be something completely different. Also the car is pulling about 20inchs of vacuum at idle and there is no way 280s with a 11.5mm will do that. im gunning on the cams being way smaller than 280s and the sheet metal mani.

 

I's say wrong cams also.

 

id say buy an sti they are so much better!

 

I'm happy that the motor is healthy,,,, Don't come back to the dyno with that exhaust on.

 

Are you sure you performed the leak down correctly? I've never seen 0-1%...what were the actual numbers 80 over 80, 79 over 80?
and I thought when you pumped air into the cylinder before it was spilling out past the valves? Was it not at TDC before?

 

They idle with around 7-8 until you crank the idle up to 1500 or so. I would bank on non GSC cams, and probably something like HKS 264s or BCs.

 

X2. Especially on a built motor with loose pistons.

 

If they are BC's you could count on the car running like ****.. I guess verify the cams are what they are supposed to be..

Mike

 

Sorry Bobby our super cool VoIP phone system sucks royally this week. Your first message was left at 7:15pm Thursday and we were closed. When i went to return phone calls at 10am on Friday i noticed we had a new problem with our phone system in that we had a dial tone but when a number is put into ring nothing happens.

Now on to verifying the cams there are a couple of different things to do. For one ask the person who you purchased the cams from to give you the original invoice or have him contact the company he purchased them from to get it. all but 1 of our dealers are still in business so it shouldn't be a big deal. next you can verify on the box it self as there is a sticker that will say Evo 4-8 S3 evo cams on the out side end of the power-division box. if that isnt there than i'm sure the cam card is not included in the packaging either. So its time to do some manual work to figured out what you have in your car. here we go shoot a good picture of them so i can see what the billet looks like and who's it might be and then (as i told you over the phone) messure the lobe from nose to heal using some calipers. make sure you get as acuate of measurements as possible for me so that i can calculate the lift number. Next Email me greg@gscmotorsports . com both the pictures and the lobe measurements and i will let you know what i think.

bosco121, my 4G63 Evo profiles make more power consistently than every other cam manufacture on the plant. That S3 grind has been in 3-4 high profile cars making 1k whp and above. As far as our grinding accuracy goes they are ground on a CNC grinder with less than .001" run out lobe to lobe and less than .0001" for lobe to profile accuracy. so i would suggest you confirm that what bob has in his car is what he actually thinks it is before making a statement regarding the profile.

 

i appreciate the response greg. i just emailed you the size of the lobe. its going off memory i may need to measure again. also ill have to pull the valve cover again to get you some pictures.

 

mike, its nice to see that you keep reporting back to my thread, considering how busy you are. your words are truly valued, thank you.

 

The tester we used was a snap on leak down tester with one guage. we hooked everything up made sure the piston was at tdc and turned the regulator to the line on the guage and then watched the needle dip down 0-1% maybe 2%. and yes it was spilling out of the exhaust before because one of the valves was open.

 

Thats great that your cams make good power and your tolerances on the cam are that percise. I never said they werent a good cam. I said the so called S3s that are in his car suck meaning they are not s3s they are more like a hks 264. If they were s3s i guarantee it would put down some really good numbers.