AM2

nevermind dont ask yourself that. you have completly different goals for your car. or bash away 777. YA YA YA YA BASH BASH BASH BASH YA YA. i can feel it coming.

777

iTrader: (21)

what are you talking about..your last two posts...i don't follow what you are saying

AM2

i give up.

go do something else.

XIII

AM2 - I think with the RPMs you want to turn you probably don't need to destroke the motor unless you have other concerns besides piston speeds. I am not an expert compared to many who post on this board but maybe we can turn this thread back on track. Just based on math, with the stock stroke you would be dealing with piston speeds @ 8000 rpms only about 200 ft/min faster than a 4" stroke at 7000 rpm. 7000 rpm w/ a 4" stroke is pretty common. @ 9000 you are looking at about 800 ft/min over the 4". Someone more knowledgeable than me will have to give thier input for when the piston speed is too much.

I would focus more on the top end, especially the oiling system at those revs, particularlly for a road corse car. I have heard that many people have had problems @ 7500+. I remember reading that the Colonel (posted in the thread I posted on pg 1) had a lot of issues getting oil to the top end at HIGH rpms.

AM2

XIII, thats an interesting point. there is so much to think about to shift an engines limits so much higher. this was just to inquire about doing it. it seems it may be far fetched. i guess nobody has done it for a reason. but who knows.

Drew

XIII, I dig your Sig aswell......

OT but did you happen to catch Dem. Zell Millers speech....Dayamn

LSs1Power

iTrader: (5)

AM2, If the setup going to be for road course then go with 4.125 Bore stock LS1 Stroke or 4.000 Bore and 4.8 crank and keep the engine N/A. The larger difference between the bore and stroke will really help your engine rev freely close to 8000RPM. U will have a really broad power band with such a setup and its more stable for a road course setup than a turbocharger. Just my .02

AM2

yeah i would not mind having a n/a motor to 8K..that would be fine with me.
i might try to look into that also.

i just thought that a turbo setup would give the torque/hp curve a HUGE flat line from 4 - 8K. i might just look into a 20B for the Rx. i dont know yet.

i really wanted to step away from the rotory engines and a turbo/ls1/fd rx would be amazing and very different.

i just want the high power..longer. thats it.

XIII

Drew,
There are other issues but I am sure with enough work you can get around them. Don't let this stuff get you discouraged. People have done it. I would contact one of the sponsers around here to get some ideas. MTI is building Colonels car. I know HPE is doing Slomaro's car. Both are N/A but I would imagine they are/will be turning more revs then you plan to. I don't know of anything like this Thunder has done, but I highly recommend them, they are very helpful. Good luck, and keep us posted if you go the LS1 route. I think its great when people try new ideas.

Thanks. I missed the speech but read about it. Just FYI, some members of this board are very political and this could very easily hijack your thread. There is a political section in the racers lounge you might want to check out. - Trey

AM2

lol ok thanks for the heads up.

i will try to go the ls1 route. i think it is one of the best swaps you could do, hybrid wise. this project reminds me so much of a shelby cobra. im so excited. do you reccomend buying a used ls1 or know any place that sells new shorts for good price?

z98

Well, if you really want to do this you're better off starting with a SBC.

Many more people have been there and got the t-shirt.

XIII

Depends on what your plans are. Where are you located? That way you might have access to someone local. Unless you have a lot of experience building motors I would suggest you skip trying to build your own for something this extreme. I know APE has some good deals on here alot. I have seen first hand some pretty extreme nitrous motors LME has put together locally. I would call one of them (both sponsers) or the ones I listed above and talk to them about your goals. You have some options with parts as well as using the stock bore, resleeving an aluminum block, or using an iron block. I would talk to them and see what fits your ideas and budget.

Ben R

4.125 bore x 3.622 stroke + solid-roller camshaft/valvetrain = lots of usable RPM's. There are a LOT of other things that must be done to a setup like this to make it work, however. Don't think for a second it's going to be easy or cheap.

rons 00z

iTrader: (10)

unless he gets an aluminum block he wont have the weight advantage of an ls1. as i said earlier get a used ls1 block and have it resleaved with the stock stroke then put a turbo on that. or keep it N/A but either way you'll be making big numbers

Sky042

iTrader: (1)

I've heard of the guys on CZ28 destroking LS1's and spining them to 10k for road race applications. There are kits specifically sold to destroke the motors.

LSs1Power

iTrader: (5)

10K RPM!!!!!! I would like to see some proof about this.

Sky042

iTrader: (1)

CZ28 Advanced tech forum.

I'm gonna guess you'd have to do some searching on it since I read the thread like 2 years ago. It seemed to be kinda popular for a while after GM came out with that one camaro factory hotrod that had a 302 LS1 in it. IIRC the kits were very expensive like $10k-14k and it'd seemed to be road racers who wanted it. I haven't been to CZ28 in a long time so I don't know if they keep a technical archive of old threads or not.

PREDATOR-Z

Someone is applying "ricer" thinking to LS1 territory, Hmmmm, I wonder who that is.
SBC is your cost effective sensible option.

rons 00z

iTrader: (10)

you guys are morons. no really though how are you keeping this thread technical other than you think and mabey ideas your not so leave your a cancer to this thread he gave a goal and wants some feedback on how to accomplish it. hey i have an idea lets bore a ls1 block to it's max bore? ah thats stupid if the stroke isnt square then it's not worth biulding it either needs to be square or stroked. if you guys think it wont work then explain why it wont instead of sounding like an *** and just bashing the guy

PREDATOR-Z

Take it with good heart.
GO BACK TO SCHOOL AND LEARN HOW TO SPELL.
At least we are educated morons.

Benjamin Russick

iTrader: (1)

With a car as light as a RX7, there is no need for a ton of torque on a road course. It is all about the gearing... Plus, IMO a turbo will just unsettle the chassis when boost hits. Build yourself a nice forged solid-roller and set gearing accordingly. You will go stupid fast with less hassle. My $.02...