jaydmcrx

I was curious. My set up is going to be a full race whole turbo kit, With the t3/t60-1 turbo. I know the manifold will help spool quickly. And the ls has the longer gearing. But also i know when the turbo spools the rpm's are going to be instantly over. So i guess what my question is what are you guys doing for higher revving? Or is it even necassary with an ls? The redline is only at 6500 so ummmm I guess i was just curious.

STHPERFORMANCE

With Valvesprings and Retainers you should be able to spin it to 7500-8000Rpm.....
My question is, If you are going "Full Race" why not toss a vtec head on it, They flow better then the LS and can handle 8000-8500 RPM . For the money on Porting a LS head and buying valvetrain you could slap a vtec head on it and get a grip load of more top end power...

jaydmcrx

Yah i was thinking that too, Or maybe even just going with a whole b16a1 swap. My goal is 375 whp so i think i should beable to hit that with an ls or b16.

STHPERFORMANCE

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jaydmcrx &raquo;</TD></TR><TR><TD CLASS="quote">Yah i was thinking that too, Or maybe even just going with a whole b16a1 swap. My goal is 375 whp so i think i should beable to hit that with an ls or b16.</TD></TR></TABLE>

375whp is easly do-able on a Ls/Vtec with some boost......
Just toss some pauter rods and a nice set of JE or CP pistons in there. Also, Dunno what your budget is on your build but you might wanna consider a sleeved block so you have potencial of way more HP ... A sleeve block would set you back on average about $1000 dollars unless you got some hookups..

B18bEK

i rev my stock ls turbo to 7500 without any problems

jaydmcrx

Price is not an issue. I am going to use darton sleeves, with cp 8.8:1 pistons eagle rods, And a pandp ls head, with a jg edlebrock intake manifold. I am going to use the zdyne super ecu for tuning also. Full race turbo kit, maniflod pwr backdoor intercooler and all, with the t3/t60-1 turbo. 720cc rc injectors, walbro fuel pump and a bandm fpr. all tuned at payn technologies wich is about 2 hours from my house. 375whp is the absolute least hp i want from my set up with the ls. I was thinking of just spinning it to 7000. With some good valve springs. I think it should work fine. Any suggestions on what i should change? I am pretty new to the forced induction world, cuz i was going to go all motor and i know alot about that, but I decided to go turbo instead.

DIRep972

iTrader: (1)

With my old LS turbo set up I found that the torque kneeled over @ 6k and HP kneeled over @ 6800. Shifting at 7300-7400 yeilded the best results when racing. Revving it higher then that did not do anything w/ my particular set up. I ran it up that high all day everyday, stock head, and it never skipped a beat. Just keep up w/ those valve adjustments

Sohc Driver

revving higher in an LS isn't a good idea, you may rebuild and upgrade the valvetrain, but the LS still has a poor rod/stroke ratio which makes revving higher more dangerous in the LS? And another thing..isn't the b18b rev limiter at like 7200?? Why would the redline be at 6500?

Khoi

jaydmcrx

6500 is where the tach goes, And i will upgrade the valve train. As far as the bottom end goes, There is people with just arp rod bolts spinning to 9k all day. eagle rods come with those, I think i will be fine.

STHPERFORMANCE

If price isnt a issue i wouldnt use Zdyne... Get something alittle better like AEM or SpeedPro ect..ect..

Sohc Driver

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jaydmcrx &raquo;</TD></TR><TR><TD CLASS="quote">6500 is where the tach goes, And i will upgrade the valve train. As far as the bottom end goes, There is people with just arp rod bolts spinning to 9k all day. eagle rods come with those, I think i will be fine. </TD></TR></TABLE>

Well..there is more to the bottomend that you should be worried about. With a poor rod/stroke ratio, the bottom-end will evenutually give out on you because it wasn't made to rev that high. You have to understand that since the rods are longer in the b18b, there is a lot of stress on the rod on the upstroke since it is at an angle before it actually becomes fully vertical upon combustion. Over a period of time, revving the motor past what it was made to do will eventually snap that rod. Even if you do upgrade the bottom end, it may make it stronger but, but will only postpone the inevitable. Also another thing to consider besides the rods is the fact that since the rod is pushed up at an angle, it actually pushes the pistons against the cylinder walls, overtime causing the cylinder walls to arch or even wearing out the rings. So my opinion, is to just keep the b18b reving as high as it was made to do.

Khoi

jaydmcrx

Yah this has been an ongoing discussion in the all motor forum forever. The fact is Is that rod bolts strong rods, block girdle ect....The motor has proven to spin to 9k safetly just as long as its built right as it is in every application. Rod to stroke ratio is fine in an ls. Like i said just as long as its built right. 90 percent of the time ls vtec failure, and Motors going bad is due to putting a vtec head on an ls, and revving the **** out of it. They make better bearings, good rod bolts, And hundreds of other things that make this reliable. I dunno I used to be an all motor junky, and have argued with people about this subject forever. I have many friends that have had great luck with ls vtec. Ok im gonna stop now cuz this isnt what this thread is about. But your theorys are correct. Just as in stroking a motor etc.....Thanks for all your help guys. And concerns. Like i said i am new to the forced induction world. And i am learning slowly but surely.