stacy moore

This is my friends Road Race-Trans Am style- Ford T-Bird with a 750HP 351ci motor that costs about $4k to rebuild every season.
We got to talking about the Twin Turbo LQ4 1968 Camaro that Im working on and the conversation went to "How do we make a Junk yard Motor last a season on a road course with adding a turbo to get close to the same power level and run on 93 fuel"
Can it be done?
what motor would you pick?
what turbo or turbos?
and use a blow thru carb.
what cam?

stacy moore

So Im thinking this;

Vic Sr intake
Dry sump
S475 turbo
Tick Performance or Lil John Cam

Camaro9969

iTrader: (12)

I've got a friend who races a gn with a v8 single turbo let me give him a call and ill get in touch with you. What's the class qualifications??

stacy moore

He runs "TT" (time-trials) & SU. mostly just races for fun about 10-20 times a year on all the West Coast Tracks like Willow springs, Button Willow,Spring Mountain, PRI, Cal Speedway, Las Vegas Motor Speedway... ECT.

Sales@Tick

iTrader: (3)

I'd be glad to help. Just let me know how or when.

stacy moore

Well Richard & myself are new to the turbo world so I've seen you state in other posts that every thing has to work together. So we are starting fresh and want to use a junkyard motor & a blow thru Carb, the care weights 2400# and has a 9" rear with a 4spd Jericho. it has 2" headers that wrap around the back of the motor to the passengers side door that has 2 mufflers and has lots of room for a turbo.
he wants to have the motor last a season or two.
So with this info can you do a cam, intake & turbo combo for this running on 91 pump gas . if you need more information let me know

Preston99WS6

iTrader: (7)

Your gonna need to inject some methanol to live a season at 750hp on 91 octane. If you dont you will have to be really conservative on the timing and its going to be slugish.

ARP rod bolts/main studs/head studs/LS9 gaskets. I know 1/8 mile stock motors hold out really good but there not getting beat for long periods of time.

My vote is 4.8 for the shorter stroke should live a little longer turning higher RPM. There also easy to find and cheap if it lets go.

S475 with 83 mm turbine .90 A/R so it lights off fast.

Go with a cam from Martin seen several different cars/trucks sporting his stuff and they all work well.

Cool build by the way.

Sales@Tick

iTrader: (3)

Why 2" headers? 2" primaries?

stevieturbo

I disagree on the methanol.

Just build it lower compression than the current high CR trend and it will be perfectly happy on the lower grade fuel.
It may require an extra psi or 2 of boost to meet the goals, but it will give a huge safety margin.

Preston99WS6

iTrader: (7)

Bingo, but then it wouldn't be a junk yard motor anymore, 4.8 with 317 heads is about as low as you can get which is another reason I recommended it. Should put the static CR around 8.8.

stacy moore

Martin thats what i has on it now,I guess he could do a flipped truck hot side as he has a lot of room.

what intake for a carb should he use with your cam.

stacy moore

wow I like that 4.8 w/317 heads with ebay head studs & no methanol cuz he is running a carb.

chuntington101

Whatever happens be sure to keep this thread updated!

I would stick an intercooler in there just for the safety it adds. Yes you can get away with it on a carb, but its better to have lower intake temps.

Any reason for not going EFI and using the stock, or aftermarket, computer?

Sales@Tick

iTrader: (3)

Super Victor with an Extreme Velocity carb hat.

I would highly recommend a smaller diameter primary or a truck manifold set-up. 2" is what you would want on a 632 cubic inch 94mm twin turbo OL10.5 motor, not a street car with a 4.8!

stacy moore

he tried some Australia guys EFI set-up and kept blowing up motors so he went back to a carb setup and hasn't had a problem so he like carbs. I might get him to switch over after he sees my TT DD Camaro with no issues. i think it was lack of support for the system he was running. i think he will go with a inter-cooler its cheep insurance.

stacy moore

Street car? lol far from street- it does 1.26 min times at Willow-Springs Big track with a novice driver and to much motor.
but yes I agree truck flipped manifolds and a single turbo.

chuntington101

Stacey, Any reason for not going supaercharged? There are lots of 750+ bph cars out there on stock bottom ends these days. Pretty much a bolt on solution. Obviously you would need to get the computer working first though. Also the power delivery might be a little nicer for a high BHP rear drive car like that.

Just another option.

HexenLord

4.8 crank in a 6.0 block with L92 heads. You get the shorter stroke and rod/stroke ratio of the 4.8 for increased longevity and higher RPMs, but the larger bore increases it to around 5.3 liters overall. L92 heads and intake flow more than almost any other readily available head, power output should be phenomenal for such a small effort.

Sales@Tick

iTrader: (3)

Good deal Stacy. The decrease in spool time will be well worth it.

nocooler

iTrader: (5)

I'd be looking at some properly sized twins rather than the s4xx series turbo.