IM THINKING OF BUILDING THIS LS-VTEC SETUP,BUT I WOULD LIKE SOME OPINION FIRST. SO CAN I RUN A CHIP ECU AND RETARD TIMING TO RUN THIS AS A DAILY DRIVER?

 

You should be fine, get like a mugen program or jun program and to safe retard it, just drive around for a bit and load it and check to see if it detonates and adjust so you get it so it don't ping, but you should get it tuned but for the mean time you should be fine. get a fpr and gauge so you can throw some more fuel. have fun

 

you should be able to do that ...i had a very similar setup....lawrence at DSR in san jose wrote a program for my motor that worked really well

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tomtomloc &raquo;</TD></TR><TR><TD CLASS="quote">IM THINKING OF BUILDING THIS LS-VTEC SETUP,BUT I WOULD LIKE SOME OPINION FIRST. SO CAN I RUN A CHIP ECU AND RETARD TIMING TO RUN THIS AS A DAILY DRIVER? </TD></TR></TABLE>


lsvtec is a great choice for a motor.. there is absolutely no reason to get that carried away with compression and have to retard the timing so you wont detonate the motor?? thats like taking 3 steps forward and 5 steps backwards.. No point! why put something in when you cant utilize it on pump gas? You should run ITR pistons keep the proper amount of timing, and make great power and not have to worry about detonation.. you will make more power then running ctr pistons and retarding all your timing.. keep in mind, if you run high compression you need to suppliment it with the proper amount of octane and in some cases fuel enrichment..

I sell oversize .40 over ITR pistons that can increase your ls blocks displacement to 1.9 liters on stock sleeves. and still retain perfect ring seal.. great way to make power. good luck... hope this helps..

 

You should be just fine... Typically you see a lot of people running 12.0-12.50:1 on pump gas (92 here in Oregon) but most people doing so don't run chipped ECU's... So long as the timing is not super aggressive I'm sure you'll be cool... Personally I don't like chipped ECU's because a lot of the proggies (Mugen, Spoon, JUN, etc.) out there are ****... I actually only kind of like the SK2... We've done many 12.0:1 CRVTEC's in the past running just VAFC's and they seem to work fine... On pump gas the ignition timing has to be dialed back (we seemed to be fine at 10-12 degrees) at the track on our VP120 we advanced it back up... Even with people most commonly using Hondata today still tune for the max (or how you'll be running at the track) and TRY backing down the timing... If you can't seem to get away with that, then you'll be forced to pull timing out electronically... Just my $0.02, let me know if I didn't answer anything... Peace

 

words of the wise. Also you can try running a little bigger cam itll help with getting rid of some of the detonation. but these guys are definetley right!!

 

I run ctr pistons in my lsvtec with 94 octane and hondata, dayle driver no problems

 

Key word 94 octane. Like here in California we have 91. So you do have to build the engine to the fuel you have available.

 

or mix its really not as exspensive as people think i buy vp103 and put 5 gallons in a tank im somewhere close to 96 octane and its only 20 more a tankfull :D but you end up having to do that with 12.8:1 in cali lol

 

91 in cali and 94 and 96 in ottawa canada weird.....emmisions related probalby

 

IS THAT THE SETUP THAT U RAN LOW 12S WITH?

 

Dont do it....You will regret it in the long run!

Just use ITR or JDM ITR pistons!

Eric

 

HOW MUCH 4 UR 40 OVER PISTON?
HOW MUCH POWER WILL DYNO? WHAT COMPRESSION RATIO WILL I HAVE THAN?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rainmanEK &raquo;</TD></TR><TR><TD CLASS="quote">Dont do it....You will regret it in the long run!

Just use ITR or JDM ITR pistons!

Eric </TD></TR></TABLE>

R U MAKING 190 HP WITH A LS-VTEC AND ITR PISTONS?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rainmanEK &raquo;</TD></TR><TR><TD CLASS="quote">Dont do it....You will regret it in the long run!

Just use ITR or JDM ITR pistons!

Eric </TD></TR></TABLE>
You always have the choice of PR3's or P30's as they're right in between... On 91 with the proper timing there's no reason why you should have to go down to P73-A0's or P73-00's...

 

i have a 99si short block and a b16sir2 (p30) short block that i can use the pistons but i want to make the most of it.

 

you guys think 94 on 10.8:1 is overkill? I'm gonna run 94 (I might as well right?) and advance the timing maybe? How do you guys listen for knock on stock pistons, I can't hear anything!
Hot diggity - you guys get 96 in Ottawa? Who sells it?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by -KangaRod- &raquo;</TD></TR><TR><TD CLASS="quote">you guys think 94 on 10.8:1 is overkill? I'm gonna run 94 (I might as well right?) and advance the timing maybe? How do you guys listen for knock on stock pistons, I can't hear anything!
Hot diggity - you guys get 96 in Ottawa? Who sells it?</TD></TR></TABLE> kinda of sounds like metal to metal contact but I guess that's not a good description, just imagine the sound of you tappinga hammer ontop of your engine, then you can do it this way when the engine hesitates bad on top end.

 

Nope, anything over 10.0:1 I would run the best pump gas you can... I don't know how your gas is but if your "plus" or middle one is like 91-92 that would work just fine... As for listening for pinging/detonation, just pop your hood and rev the motor... Little fast bleeps normally work best, and if it's pinging lightly you'll normally hear the "ting" when the revs fall... If for some reason your car is detonating a lot, you'll most likely hear it whenever the motors rpm goes up (little stabs on the gas)... In either case, if it's detonating just pull some timing...

 

what will be better or make more power ls-vtec with pr3s or b18c1 with pr3s?

 

an lsvtec has more displacement - so it will probably make more power if all else is equal. Do you guys think 20 degress is too much on my stock b16? I run 94. What kinda timing are you guys running?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tomtomloc &raquo;</TD></TR><TR><TD CLASS="quote">IS THAT THE SETUP THAT U RAN LOW 12S WITH?</TD></TR></TABLE>

yes...i run cool blue( 76 100 octane) mixed with pump gas at the track and then i add timing

 

i would go with some pr3's or p30's
i would never run the ctr pistons on the 91 octane here in la unless its going in a b16 of course

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by riceball777 &raquo;</TD></TR><TR><TD CLASS="quote">i would go with some pr3's or p30's
i would never run the ctr pistons on the 91 octane here in la unless its going in a b16 of course</TD></TR></TABLE>
WHATS CR ON A B16 WITH CTR PISTONS?

 

I calculated this out awhile back since it always starts a debate... The only thing that makes the B16A with PCT slugs yield a tad bit higher C/R over a stock B16B is the piston to deck (0.020" as apose to 0.030")... Though the B16B is truely a B18C/1/5 block (270mm) the stroke is still 77.40mm (B16A)... Here are the numbers I came up with... 10.91:1 with the stock PR3 cylinder head, 11.59:1 (1 layer headgasket & PR3 head), and lastly 11.19:1 with a P72 cylinder head... The only reason I have the GSR head and one layer headgasket listed is because this is what a guy wanted... We don't do this very often and I doubt the gains are noticable, then again I really only stick to B18C's and K20's... Just my $0.02, let me know if you need anything else... Peace

EDIT: Forgot to mention again, for -KangaRod- 20 degrees should be fine especially since you're on 94... Most of the time we can take even a stock ITR (tho nothing special at 10.6:1) and run ~19-21 degrees on 92... If you notice any detonation, ping, etc. you're losing power, otherwise you're normally okay... There is a point where you begin to lose power but don't really hear the motor ping, we normally see this on our high boost FI cars, then the only real way to tell is on the dyno...