crooklyn_outlaw

will the itr cams still hold or do i need BIGGER CAMS? if so what?

ITR BLOCK
Ctr piston/ Nrp rings/seals
Stock gsr head
Itr cams.

TUNED AT FULLBLOWN MOTORSPORTS in minnesota at 165whp? dynamic dyno.

i believe that the cams are not producing enough air for the motor..

Modified by crooklyn_outlaw at 8:08 PM 11/13/2008


Modified by crooklyn_outlaw at 9:58 AM 11/14/2008

onepoint6i

You have to list your mods..

Ruben19

i would get something bigger so the motor can breath better

salman

300psi, thats one hell of a compression ..

b20vtech

it's common, sealing of the rings correctly, perfectly.

vidanator

just curious how did you break in your motor, i only got about 210 across

crx-b18c

nice compression

92integraVTECgsr

Well we don't know what pistons he is running or what kind of rings he is running. So 300psi means nothing to us right now until we get more info.

He could be using CTR pistons with total seal rings lol

crooklyn_outlaw

ITR BLOCK
Ctr piston/ Nrp rings/seals
Stock gsr head
Itr cams.

TUNED AT FULLBLOWN MOTORSPORTS in minnesota at 165whp? dynamic dyno.

i believe that the cams are not producing enough air for the motor..

crooklyn_outlaw

BEAT THE **** OUT OF IT FOR A GOOD 2 MILES.. LOL

92integraVTECgsr

ITR cams should be fine. But high compression motors like big cams so you might want to look into something bigger.

crooklyn_outlaw

my itrs are not holding up.. when it was just stock itr block i ran low low 13's all day.. with ctr pistons it felt like im not getting enough air to hold up for the compression. TUNED on e85 btw.. and now its only doing 13.5 at a trap of like 98

00b20vtecoupe

get some buddy club 4's or pro 1's

98vtec

cams do not produce air. They just allow the engine to breathe properly. Piston velocity and thrust down the bore creates the vacuum you are referring to.

What is this I have heard in the past on not to use CTR pistons with?

racebum

longer duration cams with more overlap will bring that 300psi down. 4 stroke basics 101 link cranking pressure with compression ration and the cam. a 11:1 motor that makes X-psi with a 240/235@.50 grind will make less with a 250/245@.50 grind.

i doubt your cams are holding anything back. you just can't time that motor without knocking since it has a lot more compression than pump gas and ITR cams would like.

crooklyn_outlaw

so should i get it tuned with a different tuner?

00Red_SiR

Inability to read and comprehend FTL....


People are telling you to choose larger cams not seek out a new tuner. They're also telling you that using the CTR pistons was not the best choice with your current part combination.

DonF

Can you explain why his compression test would be the same with Sk stage 3 cams?

racebum

actually i'll shoot this one back to you. if a guy has a motor with X compression and X cam. has detonation issues and steps up to a longer duration. cylinder pressure will go down which helps with the knocking problem. the compression ratio is the same but longer duration bleeds off cylinder pressure when the car is running.


Modified by idrivesideways at 11:34 AM 11/15/2008

00Red_SiR

Because the tuner series cams have stockish primary lobes which give them similar reading to the stock ITR/CTR cams. Those advertised numbers listed for most VTEC cams are for the VTEC lobes only. Only a cam with larger primaries like the pro series or Toda cams would alter the readings on a comp test.

4g hatch

thinking process FTW!!!

racebum

totally

EJ1_Ex

iTrader: (1)

thats all that you made? 165whp???? try a new tuner! im not saying that LJ doesnt know what hes doing. But thats pretty low numbers...

tony tone

what kind of header? with 300psi that thing need to breathe son.

ZeroTraction

nevermind.