im putting ctr cams with stock ctr cam gear into my stock b18c1 1994 125k.. and im wondering am i going to need new valves retainers springs? im not plannign to rev higher then 8.5k..

im wondering how much power ima putout in total?
i have
skunk2 manifold
intake
68mm throttle body
headers 2.25
itr pipping 2.25
and will have ctr cams+ getting my ecu chipped.
whats the estimate power to the wheel?

 

People run stock valvesprings with CTR cams but I've looked at the specs and I'm not a fan. At the very least get ITR valvesprings for the intake cam and move the GSR intake springs to the exhaust valves. Retainers should be OK at 8.5k. Power will be similar to a stock ITR.

 

really i dont think ima put out the same power as itr. considering itr does have itr pistons and mild port head.

 

same recommendation as gagnar.. you can run them without changing some of the valve train but youre better off at least doing the itr valve spring change. I just did it for the peace of mind and reassurance that they have the proper springs for the cams. Its a question of what risk factor youre willing to put your money on.

You should still be close to itr power with the mods you have. If youre motor was healthy before you would be putting down between 140-150whp before upgrades. You asked for an estimate and 'close' is about as good as you can get without a dyno. Are you getting chipped and tuned? If not just do a dyno run at a local shop. Youre in la so head over to raceline in temple city. Should be around $75 just for a dyno graph.

 

You'll be fine if you keep the rev limit of the b18c1 to be safe. I had 00 ITR on my stock GSR head for 3 years revving to 8500rpm.

 

wells i'm gonna get my ecu chipped at eriks racing they sed they gonna check my timing and if i get enough fuel or not.. kinda like a mini tune?

 

Doesn't mean it's "safe".

 

wells i'm gonna keep my rev limit at 8.2k i would like to go 8.5k but seems a littlee risky.

 

Quick question are ITR/CTR cam gears really required? Please keep us updated after you install your cams and a tune

 

No

 

alrite wells erik at eriks racing wasnt here today so i'll keep it posted and tell you how it feels i prolly won't get it dynoed till.. later on tho.

 

I need to stop by there and ask them about a ecu i have with his name on it.

Arent the cam gears for itr the same as stock gsr anyway?

 

Haggai think they are the same thing

 

uppp! didnt get to do it..prolly cant do it for antther week i got homework..

 

Doesn't mean it's not possible.

 

just called.. eriks racing. they sed its fine to rev up to 9k. and won't have any problems. lol thats with stock gsr valve springs and retainers. but gonna need a valve adjustment.

 

Sure.

 

Bs. Haha. Rev to 9k on stock vt. You will float your valves and more. I'll tell you that.

 

You won't make power that high. So why do it?

 

Don't go back to that shop. Running CTR cams on GS-R springs is iffy for multiple reasons, but possible. Running up to 9000 is NOT POSSIBLE on stock springs or retainers.

 

Like I said 8100 rev limit. You'll be fine all day.

 

lol. i'm just planning to rev it to 8.5k so yeah. i know it doesnt make any more power then that. wells is reving to 8.5k cool? i found some b series crower valves springs and retainers for 100. not sure if i should buy it yet. i won't be reving it to 9k for sure. setting my rev limiter at 8.5k i should be shifting around 8.3-8.4k how does that sound?

 

Stiffer valve springs and retainers and a good idea weather you're revving to 8,100 or 9,200. Why spend all that money to float a valve and possibly destroy your head? Doesn't make any sense.

 

The concept is simple. The higher you want to rev on a stock valve train the greater your risk of screwing something up and the higher you go the closer you get to 'when' not 'if'. Every persons mileage will vary because each persons parts are in different shape so you have stories of so and so who drove for 4+ years so far no problems and then you have another guy who blew his motor in 2.

Go with the recommendations or choose your own risk factor. I chose to go with itr intake valve springs and move my gsr intake over to exhaust side for itr cams. Ill know where i can rev to when i get it dyno'd. It did not cost much more for the peace of mind but it did take more labor.

 

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