BlackRocket

Need to build a LS version Road Race Motor;
Considerations include:
Pump gas a must
Hydraulic lifters
Dry Sump
LS1, LS3, LS3 or LS7; (Cost is a factor)
Best bore x stroke config with regards to block used
Carb of Fuel Injected

Any all inputs appreciated... Thanks!
Considering Texas Speed for build??

topmover

Golen Race Engines in New Hampshire would be worth you considering if location is not a concern.

msracing

i just had one built by T.E.C. out of Riviera, Florida .. we build a LS2 with Dailey Dry sump, oliver rod, J&e pistons, cali crank, plus all the other top end goodies.. this motor was built for longevity 120 race hrs... and it made 550 hp with 525 lbs tq all on pup gas... Mike is a LS specialist and has Made a great reputation in the road race world ,, he builds all the Mosler race car motors
his facility are impeccable and has a great reputation in the eastern USA.
561-842-2813 Good luck..Manny

bosco022

First of all...What rules are you running under?

The above LS engine builders have good reputations. Another way to go for affordablity would be to buy a GMPP CT 525 carb motor and then have a race engine shop install a 3 or 4 stage dry sump system. these motors make 525 HP and 470 torque and would likely make a bit more dry sumped. There is also an factory efi version 525. They use the ASA 525 lift cam, which is easy on the valve train yet makes for a good torquey motor for road race that need not be twisted much over 6500. You would likely have about 11000 in a dry sumped version of these motors. 7000 plus dry sump and labor.

This would be a cheap motor program as you could run it a couple years, sell used and buy anothe long block to replace. Some have used these in the Trans Am 2 cars. (Injected)

You can get an all forged dry sump road race LS3 from 15-16 K up. (way up)

I am converting an ex ASA motor to carb and full dry sump (3 stage) and freshening for a little over 5K plus the cost of the used ASA motor. (which was not much) This will be about 480 HP and 430 torque. I did install used 243 heads anda warmed over version of the ASA cam

63Corvette

I would look into the ASA motor...either carb or injected

AU N EGL

http://www.schwankeshortblocks.com/shopping/?ic=1932

Zenak

LS3 blocks are the best bet as a starting point and bang for the buck.

LS2 have oil issues in the corners.

Zenak

Heres that motor, the part#19271821 for the CT525 - link below:

http://store.chevroletperformance.co...-19271821--%3E

bosco022

Jegs had them for sale at 7000

AU N EGL

7 large? why even build one for that price

RX-Ben

The CT525 is actually lasting more than a few laps in circle track racing w/o blowing up?? Anyone seen the inside of the oil pan they come with?

bosco022

They are winning in dirt late models.

I am recommending a three stage dry sump system on these for road racing. No way it lasts without.

6SPEEDZ

LS2 blocks are actually better than LS3 blocks. The LS2 and LS3 have the same oiling issues when they are stock wet sumps, it is the same oil pan. The LS2 is the best aluminum production block there is at the moment. The bores are more stable than the LS3's are. They don't have the block strength issues the LS3 has due to increased bay to bay breathing window size. The cylinder liners are harder in the LS2's.

RX-Ben

Are you sure about this (other than the matching pans)?

rmackintosh

I have had great experiences with MAST Motorsports in Texas as well with my LS motor!

AU N EGL

Yes.

and the stock LS3 heads hold so much oil that under hard hard braking, the oil does not drain back into the pan quick enough, and oil starvation happens then too.

have seen a few LS3s with extra oil drain lines in to help this issue.

RX-Ben

Well, that is more about the heads than the block, but it does correct that point.

I would be interested to hear where you got your info regarding block strength, bore stability and liner differences.