Greg@RET

iTrader: (3)

I am debating on what motor to throw in my new build. I am thinking of this set up. Thoughts?
http://www.crateenginedepot.com/stor...1-P2303C2.aspx

97ta383

iTrader: (5)

$9500 that looks like a dam good price to me just put a bigger cam in there and it should be one nice street motor. Man i think i may save for that!

smok'nZ

iTrader: (160)

i would do a hke 408 with tfs 235-245's my self but if you want the ls7 heads i understand, you could use a 4" crank on that and it would be a 443 i think a guy somewhat local to be had a 454 and turned it into a 443 im not sure exactly why maybe something about it burning less oil, his name is 03supercobra if you want to pm him and ask a few questions, goodluck with finding a new motor

35th SS

iTrader: (2)

decent/good price if it was me would do a custom build from one of the sponsors.HKE comes to mind.

Jontall

That's a nice motor all-right with a nice price.

Greg@RET

iTrader: (3)

Do you guys know what size injectors come with this set up? I am assuming 47#?
http://www.crateenginedepot.com/stor...5-P2514C0.aspx

Jimbo1367

I THOUGHT the LS7 had the same injectors as the LS3

Stang's Bane

iTrader: (22)

Not a bad price at all...

Greg@RET

iTrader: (3)

Hopefully someone will give me some insight on what size injectors they are. After looking around Jegs sells the same motor for $9299.99

ringram

Thats my understanding, 40lb IIRC.

Greg@RET

iTrader: (3)

So not enough injector for that motor lol

454spyder

I just bought this motor along with the carb style intake + added an Elbow and 50lb/hr injectors. It is a sweet motor with heads that flow 370+CFM as cast - not the LS7 Heads, but new LSX Heads.

1. Is a 90MM TB OK, or should I get one of the new bigger ones: 92MM, 102MM etc?
2. I have a Bigstuff3 in my car that was used with my FI BBC 454. It is 3 years old. Should I continue to use it. I'll probably need to send it in for updating + order a new harness for the COP ignition the LSX uses.
3. Will I be able to use my Accell 300+ (just like a MSD 6AL) or do I just run off the Bigstuff3 alone?

Thanks

Jimbo1367

Where did you get this flow data?

Greg@RET

iTrader: (3)

How much did you pick it up for? If your running the bs3 efi set up that will control everything. No need for the accel stuff. If I didn't have to use the GM controller kit for marketing reasons I would throw a Bs3 on there myself.

454spyder

Hey Jimbo-here is the link describing the flow of the new six bolt LSX head (based on the LS7 head, but not the same).

http://www.popularhotrodding.com/tec...fications.html



97 LS3: I bought it from JEGS for $9299. I purchased the carb style intake, oil pan, 8-bolt flexplate, and water pump from Crate engine depot (pretty good prices but I forgot about GMparts direct - could have saved about $60 or more).

I bought the intake elbow and injectors from Jegs also along with some bolt-in/weld-in motor mounts for my install.


Anyone have comments on the TB size? Is a 90 MM still OK, or should I go with something bigger? I may have to return my elbow (edelbrock) and get one that works with the bigger ones.

Greg@RET

iTrader: (3)

90mm is enough... my race car runs a 90mm and goes mid 8's like that.

454spyder

Cool, I was hoping the 90mm was enough for the LSX454 since I have one.

Thanks

davidws6

iTrader: (36)

If you want a few more hp, go with the FAST 102/102

Mine gained 23 hp and 19tq from a ported ls7 intake with a 90TB

It's a pretty good chunk a change for these ponies !

Jimbo1367

454spyder ,
Thanks. I wish they (article) had more data on the head flow.
thanks again,
Jim

454spyder

Jimbo,

there is a few more articles out there on those new heads. The CNC version flows over 400 CFM. Pretty crazy stuff -thats darn good for a big block head. LS engine architecture is pretty amazing.

Do some searches for 454LSX GMPP and you'll find more