Horsepower ?'s

[SlowerCivic]

Ok my goal is 350 hp to start,I have a b18b1 that has a T3/T04B turbo on it running 7 psi.I want to bore it out not sure how much and get the biggest pistons possible and put some eagle rods in it now if I do that with proper tuning is it possible to gain that.Now I want to feel safe giving it as much hell as possible and not have to worry about cracking sleeves or warping them and I dont really want to fuck up anything .

[mellowboy]

Its not really neccessary to bore the block out when u have FI. All i can say is rebuild the motor to higher compression (10:5) or lower compression(9:5) and resleeve with either darton or my favorite...eagle golden sleeves. I'd get wiseco pistons. If you wanna get cheap then get srp pistons. Notice when i said higher compression. It'll make more power but u need PROPER TUNING. You might not boost as high but u'll make more power and it'll be faster. Less lag also! Theres so many ways of makin this happen. U just gotta research. Try www.importbuilders.com.

[eckoman_pdx]

As mentioned above, you'll want to resleeve the engine. Darton, Golden Eagle and AEBS all make sleeves. I personally perfer AEBS, although all are better than nothing. AEBS uses a 2000 interference fit, which goes 3/4 of an inch into the block, plus a sealent. Golden Eagle had a problem awhile ago with the sealent they used. They have since fixed the problem, but will not say what the new product they use is, which always leaves me a little wiery.

You'll also want new lower comperssion pistons. You already have the engine on boost, so forced induction (FI) is obviously your route. Lower compression is better for FI apps. Most factory turbo'd cars have a compression ratio of 9.0:1 or lower, usually between 8.5:1 and 9.0:1. Lower compression pistons help reduce the risk of detonation, which is why they are desirable. Arias and Weisco make some good pistons, look for that route.

I'd also recommend Crower's Turbo Cams for the LS. Crower makes some very good turbo cams for the LS, and they add good power.

A Port and Polish to help with head airflow will help also, as will a valve job. If you are really looking for power and want it bulletproof, build the head up, new valves, springs, retainers, etc.

Also, the LAG with a turbo is caused by the time it takes the Turbo compressor wheel to spool up, NOT by the piston compression ratio. The way to elimate lag is through proper turbo sizing when choosing a turbo. If a turbo gains a noticable onset of boost at 4000rpm, the lag will be there until 4000rpm, regardless of c/r. A higher c/r may give more off-boost hp, so that may help you reach the hypotheical 4000rpm on-set quicker, but the lag would still be until 4000rpm. If you are looking into 350WHP with a B18B1, I wouldn't put in high c/r pistons, get some good low cr pistons. Proper tuning should ALWAYS be a part of a good engine set-up, N/A, FI, or otherwise. Consider looking into a good stand alone like a Hondata if you don't have one already, and get some good dyno tuning done when your finished with the build/install. Make sure to put some money aside for the dyno tuning, and make sure to do your research.

[superbluecivicsi]

Looking into a good stand alone like a Hondata if you don't have one already, and get some good dyno tuning done when your finished with the build/install.

here ya go

http://cgi.ebay.com/ebaymotors/ws/eB...category=33553

[mellowboy]

He doesn't really need aftermarket cams unless he wants to run rich. High cr is much better than lower cr when it comes to boost. IT doesn't lag as much as lower cr pistons! If you think about it, When you boost higher doesn't it make more lag in the begining? When he goes higher cr, he'll make more power on less boost. He'll be just as fast or faster. Like i said its all in the tuning. If he can't find a good tuner then i'd suggest to keep your stock c/r. My boy is running high 11s on fully built gsr motor with 9:1 cr and now he changed it to 10:1 (stock cr) and running low 11s. Its really up to you want you want. Either way its not neccessary to get aftermarket cams. My boy is still using stock gsr cams

[eckoman_pdx]

Originally Posted by mellowboy

He doesn't really need aftermarket cams unless he wants to run rich. High cr is much better than lower cr when it comes to boost. IT doesn't lag as much as lower cr pistons! If you think about it, When you boost higher doesn't it make more lag in the begining? When he goes higher cr, he'll make more power on less boost. He'll be just as fast or faster. Like i said its all in the tuning. If he can't find a good tuner then i'd suggest to keep your stock c/r. My boy is running high 11s on fully built gsr motor with 9:1 cr and now he changed it to 10:1 (stock cr) and running low 11s. Its really up to you want you want. Either way its not neccessary to get aftermarket cams. My boy is still using stock gsr cams

Hey man, sorry it took me awhile to respond. I have been out of town, so sorry this took so darn long, lol.

Anyways...

True, aftermarket cams arnt' neccessary, however crower does make some good cams specically for turbo apps for various motors. Although it's not like you NEED them, like you need to re-sleeve, new rods, pistons, etc. A proper cam choice can benifit, a poor one cause issues. All cams are definaly NOT the same, and more often than note running stock is certainly better than a poor cam choice in many cases.

As for boost lag, The base HP off boost itself isn't what cases Boost Lag (turbo lag). What causes lag is the turbo sizing, it's airflow, etc. Mismatching the airflows/turbo sizes for the application. It's important to properly size the turbo and make sure you get what is optimal for your app. Not all turbos are created eqaul. Assuming the same turbo is used at the same PSI, the B18B1 is going to have the same noticable onset of boost with whenther the motor is 140hp to start or 165hp. It will just have a little more off boost power one way. Now, if you lower the boost due to the higher c/r, and then buy a different turbo, turbosizing that turbo propoerly to oppitmize it for this app, then you very well may have less boost. Thisisn't due to the higher base hp or the higher c/r though, assuming you've properly sized the turbo in both apps, this is most likely due to the fact these's less boost being ran. Still, high or low c/r, high or low boost, don't just buy any ol turbo and slap it on. Properly size the turbo for the app and your goals. You can seriously change the boost on-set through sizing, resulting in more or less lag at the same give psi and powr level, etc.

SlowerCivic, if your concerned about lag, definatly pay the extra $$ and get a ball-bearing over a conventional turbo. Ball-bearing turbos spool up quicker. Anyways, I hope your research into all this is going well.

Anyways, as Mellowboy said, it's really up to you which way you wanna go. Just remember to do research before you actually go ahead and do everything.

[civickiller]

lot of people run there stock sleeves over 500whp, so you dont gotta worry about that with only 350whp. but of course it needs to be tuned very good and very conservative, because knock will crack those sleeves fast.

the biggest bore you should go on stock sleeves is 81.5, and 84mm on a sleeved motor. i would keep the cr stock at 9.2.

you can pretty much get any pistons you want and they should be ok. aftermarket pistons and rods and 350whp will be no problem. youll be ok with pump gas too.

you dont need sleeves or cams, but both will help you in your quest for 350whp at a lower psi.

and what makes yoru think hes gonna run rich when he gets bigger cams, it puts more air into the cylinder without more fuel so it would run lean, but if you tune it then that wont come into play