[Thacker]

Can anyone give some guidance / advice as to approriate cams. Spec: Power FC, 550's, steel turbos, filters, exhaust, de-cat, boost controller. Gave 330bhp @ hubs @ 1.0 bar on 95ron. Intend to run 1.2 bar but clutch couldn't hack it and is due to be replaced soon. Car is for fast road use so want to maintain decent road manners.

Any advice on appropriate cams and expected gains would be much appreciated. Cheers Ed

 

[The Great One]

tomei pon cams 260" 9.15 lift fit stright in no mods or clearance probs

 

[Nick MW]

I ran with the Poncam 260s with GT-SS in mine and could not have been more impressed.

 

[Alan]

tomei pon cams 260" 9.15 lift fit stright in no mods or clearance probs

Running with these on std turbos very impressed :flame:

 

[tyndago]

+1 on the 260 - 9.15 PON cams. Biggest ones you can get in there. Normally no real issues.

 

[Thacker]

Cheers all, looks like pon cams then. When fitting cams did you fit new followers or get away with the old ones?

 

[tyndago]

Cheers all, looks like pon cams then. When fitting cams did you fit new followers or get away with the old ones?

Lifters - reusing the lifters is fine. Just check for cam clearances.

http://tyndago.googlepages.com/rb26dettvalveclearance

 

[ExScoobyT]

Sean - whats your experience with timing on the Poncams for N1 / GT-SS turbos?

 

[[email protected] M/S]

Lol

You do keep asking James.How many times do I have to tell you,"no two cars are the same".

Still laughing

Tony

 

[ExScoobyT]

Tony - indeed........

 

[tyndago]

Sean - whats your experience with timing on the Poncams for N1 / GT-SS turbos?

Where to set cam timing ? I can tell you what our N1 motor had on it from Nismo. I can tell you where Mr. Tamura recommended to start.

 

[ExScoobyT]

Sean - care to share?

Tony - for a given spec you would expect `ideal` cam timing to be reasonably consistent, certainly within a degree or two.

 

[tyndago]

104/104 avg pwr 5600-7600 rpm - 315 kw at the engine.

106 in / 108 exh is where Mr. T recommended to start.

 

[[email protected] M/S]

Sean/James

I know Tamura San is a Knowledgeable man as I found out when he visited our premises,but with all due respect he does not spend 40 hrs a week on the Dyno! I would suggest his figures would be very extreme. I say it again ,start at 110/115 in & ex as Tomei suggest and play on the dyno from there.

Tony

ps I will post some before and after v-cam dyno graphs next week.They are interesting.

 

[tyndago]

ps I will post some before and after v-cam dyno graphs next week.They are interesting.

As far as timing is concerned, dyno time is concerned, Mr T doesnt just dyno his own motors. He knows a lot of people. Hes an interesting guy.

I am very interested in it.

 

[ExScoobyT]

Tony - those are the Tomei recommended timings I think? Sean interesting..........

 

[NISFAN]

I know Tamura San is a Knowledgeable man as I found out when he visited our premises,but with all due respect he does not spend 40 hrs a week on the Dyno! I would suggest his figures would be very extreme. I say it again ,start at 110/115 in & ex as Tomei suggest and play on the dyno from there.

Tony

ps I will post some before and after v-cam dyno graphs next week.They are interesting.

Tony,
What figures would you start at for 280 Deg In/EX cams?