DirtySpec wrote:

I read in a SCC article that they would not raise the redline past 6800 RPM on stock internals. So what would be needed to safely raise it to and past 6800RPM?

good article, wasn't it?

I am assuming that SCC article is very "old" and from the dark ages where QR internals were thought to not handle over 280whp.

There's people running 7000 redlines just fine...

Definitely remove the balance shaft.  That's a biggie.

Other than that, I am venturing to guess 7000 is fine on otherwise stock stuff.  It's not like you drive around sitting at redline for extended periods of time (at least I'd hope not...)

the crank will be fine.   id change valve springs and bsr to be on the safe side.....and your good for 7200

And you want to have cams, because on stock cams the car stops making power well before the stock rev limit. 

I have 2 intake cams and I make power up there, but in 3rd gear at about 6500, I feel the urge to short shift to get back into the peak powerband.  I have mine set at 6800.  The engine sounds like a coffee grinder up there too.  I have also had really high knock readings between shifts at 6800 when I tuned to a 13:1 AFR.  I taper it off to 12.5 now and it's a little better, but I'm debating pulling a degree of base timing.  I'd be scared of the rods above 7k too, they're like pencil thin.

donspecv02 wrote:

I have also had really high knock readings between shifts at 6800 when I tuned to a 13:1 AFR.  I taper it off to 12.5 now and it's a little better, but I'm debating pulling a degree of base timing.

thats weird, mine dont start knocking til i set my afr to 13.7 (just testing it out). but brought it back down to 13.1 for now.  I guess every spec is different.

well then i guess i wont rev that high until i get a piggyback.

kktohot wrote:

well then i guess i wont rev that high until i get a piggyback.

Stock, it'll run rich up there usually.

kktohot wrote:

well last i checked my afr was almost 16

Id still like to know whats going on with my car, so i need one

16 where? If you hit 16 AFR at WOT, you'd be knocking really bad.

He's prolly talking about one of the first articles where they were talking about the modifications they did to make it a rally car.  And they discuss it, with the limited amount of info they had on it.  It's not like they did a complete tear down to examine it for an informed opinion.  We are talking  VERY old issues here.  Or the one where they talk about the speed challenge specV (that car spends hours at a time in conditions that would kill a production engine.  What people don't realise isd that often times race teams will bring two extra engines in case of shit like that.  I bought those 2 issues right fter I bought my car, they are that old.  They revisit it much later it was the Nismo S tune, R-tune vs stock.  Then they had Ralliart vs. SpecV's.  (these two issues were when swapping a VQ was a pipe dream, and custom turbo kits were the only way to go).

The community and our body of knowlege as a whole has progressed waaaaaaay past this.  Balance shafts are the real limiting factor, mainly beause they counter rotate @ 2x the rpm of the crank and froth your oil (this is old info too).  Remember when people thought removing the balance shaft was a bad idea?  This is a progression of tuning this motor.  I used to bitch that there was nothing to do to this car, it was just because it was a new motor and a lot of the info was inaccurate.  Now I'm like: QR25?  F*CK YEAH!

Here are the articles from SCC web. I have found a lot of good stuff out of them, like how our gas petal works.

http://www.sportcompactcarweb.com/searc … ource=Site

I'll have to go threw them and find the phrase about the red line.

DirtySpec wrote:

The quote:

"These design elements conspire to keep the rev limit low, with a brutally abrupt fuel cut coming in at 6200 rpm. Engine management is handled with a new-generation ECU that has yet to be cracked, so the rev limit cannot be moved. Even if it could, the piston speeds are already critically high. Sunbelt Performance's Jim Thompson, who built the engine for Joe Hermes' SPEED World Challenge Spec-V, says he would hesitate to push the stock internals even to 6800 rpm."

The article:

http://www.sportcompactcarweb.com/tech/ … index.html

the problem i see with this is that people SAY things.  As cute02specv pointed out by bumping the years old thread, it used to be said that beyond 325 or so whp full sleeving would need to be done.  And this wasnt said by just some random guy either.   But then again as big j pointed out street is WAY different from race.

How do I balance my Crank

Last edited by DirtySpec (2008-08-25 14:51:07)

There's no need to put in 07 pistons...

And I am a little concerned if you don't even know what a crank is...  considering the 07 crank swap is not a direct swap to get the car running.

Should I get 07 rods if I can?

besides springs bsr and cams to make power up there, the rest isnt essential.  any car will break down if youre holding it at redline.

Now sure itd be nice to go all out and replace everything with stronger stuff

Last edited by kktohot (2008-08-25 15:23:12)

So next question is what would be a good redline on a stock motor with cams? (on JWT or on BC) I personaly dont think i'll push it past 6800 but I think I might put the redline to 7000 or 7200 just so I wont have to send it in again if I wanted to. But the springs are only good  to 7200...

Ohhh and does TechnoSquare do refalshes for our ECU's as well? And what does that do lol :S

Or could I jut dyno tune with a SAFC ?? I might do that eh eh!

Last edited by DirtySpec (2008-08-25 23:05:32)

DirtySpec wrote:

So next question is what would be a good redline on a stock motor with cams? (on JWT or on BC) I personaly dont think i'll push it past 6800 but I think I might put the redline to 7000 or 7200 just so I wont have to send it in again if I wanted to. But the springs are only good  to 7200...

Ohhh and does TechnoSquare do refalshes for our ECU's as well? And what does that do lol :S

Or could I jut dyno tune with a SAFC ?? I might do that eh eh!

Technosquare currently does not offer reflashes for the ECU, however, they will be willing to try and work on getting a reflash for us if someone is willing to donate their car as a test mule for a few days.

Yeah it's on their website...
application list

And I am a little concerned if you don't even know what a crank is...

From the questions he asks, I'm thinking he is learning everything from scratch...

I was a noob too once, lol.

I think that is a legitimate concerned... swapping the cranks isn't a beginner or intermediate modification...