LM7 383 Build Up

[George C]

you would be better off staying return then going returnless. use your current fuel rail on that intake. but since you already spent the money, remember you will need to retune for the returnless, if you dont then youll have fuel issues

[blackout]

you would be better off staying return then going returnless. use your current fuel rail on that intake. but since you already spent the money, remember you will need to retune for the returnless, if you dont then youll have fuel issues

I have heard that it will need to be re-tuned for a retunless slope fuel system. but thanks for the heads up.

Sleaper is correct. 3.905 bore and 4.0 stroke. which is 383.02ci.

So I have been looking at the 220/220 cam that thunder racing and texas speed offer and they look like the same duration but way different lift. texas @.581/.581 and TR @.551/.551. which one would be favorable?

I wanted to keep my torque converter stock.

What is the max lift my yellow valve springs on the 243s can take?

[George C]

I have heard that it will need to be re-tuned for a retunless slope fuel system. but thanks for the heads up.

Sleaper is correct. 3.905 bore and 4.0 stroke. which is 383.02ci.

So I have been looking at the 220/220 cam that thunder racing and texas speed offer and they look like the same duration but way different lift. texas @.581/.581 and TR @.551/.551. which one would be favorable?

I wanted to keep my torque converter stock.

What is the max lift my yellow valve springs on the 243s can take?

if you want a stock manor cam with power go to the cheater from thunder. I always prefer thunder over TSP. Tsp is good but i like thunder better

[blackout]

if you want a stock manor cam with power go to the cheater from thunder. I always prefer thunder over TSP. Tsp is good but i like thunder better

what is the longevity of a cam like this or a tr220? I don't wanna be replacing valvatrain parts after the fact. I want this motor to run for a long time and be reliable.

And who would you guys recommend for a mail order tune so I can get some miles on it before taking in to be dyno tuned?

[zebra]

well that'd be 382.08ci

...close enough, i reckon

...Sleaper is correct. 3.905 bore and 4.0 stroke. which is 383.02ci...

whoops... my bad math

...And who would you guys recommend for a mail order tune so I can get some miles on it before taking in to be dyno tuned?

you should know who they're gonna recommend around here
not that Allen ain't good or anything... just he ain't the only option. some people also have BlackBear, Wait4Me, and Wheatley mail-order tunes.

[zebra]

good point... i didn't even think of that

[blackout]

So would the Thunder Racing TR220-114 work with my stock stall torque converter? The tranny was rebuilt 10k ago with a shift kit.

[pl4yboy]

So would the Thunder Racing TR220-114 work with my stock stall torque converter? The tranny was rebuilt 10k ago with a shift kit.

I think that would be a good cam for you if you used a TB stall.

[blackout]

ttt.
anyone have a suggestion on which oil pump to use?

I have been looking at the mellings m295 and 10296.

[George C]

ttt.
anyone have a suggestion on which oil pump to use?

I have been looking at the mellings m295 and 10296.

stock 6litre one is plenty. there isnt one reason to run aftermarket with the quality gm builds these days.