CK5
Register an account today to become a member! Once signed in, you'll be able to participate on this site by adding your own topics and posts, as well as connect with other members.
Sold Edelbrock 29785 MPFI intake
- Thread starter Bent77
- Start date
beags86
Eastbound and Down
Pm Inbound
Wish they made one that wasn't so high in the rpm band...
beags86
Eastbound and Down
Efi doesn't work in the same way as carbs.
So the rpm Range that is stated for the manifold isn't the same. Dry flow vs wet flow. The manifold is based off the carb rating of 3500 to 8500.
That's just where it's going to really shine.
With efi, it's reading where you need fuel and where you don't.
This manifold will find its new life on my 406. It's not a 8500 rpm engine. I have zero concern about it running correctly below 3500.
beags86
Eastbound and Down
Also known as the 245hp max.
Haha.
Last edited:
Yeah on a stock L98.
beags86
Eastbound and Down
Right and that's about max hp for a low flowing tpi setup.
I know your going to give me a post about how you made X,Y and Z hp.
But let's face it they are just to limiting without big mods to make real power.
Yes they are obviously limiting for BIG hp numbers, but for a truck that never needs to go over 5k rpm and loads of low rpm torque they’re great. A stock tpi will make 400hp on a 383. That’s plenty for me.
beags86
Eastbound and Down
400hp on a stock tpi??
I doubt that.
I'll believe that when I see it.
Post some dyno sheets....
I doubt that.
I'll believe that when I see it.
Post some dyno sheets....
The only dyno sheets I have are for my boat engine. But this is a copy and paste from a Richard Holdner article.
“
Equipped with the stock TPI system, the 383 produced 410 hp and 501 lb-ft of torque. After installation of the Extrude-Hone ported lower manifold, TPIS runners and ported plenum, the peak numbers jumped to 451 hp and 533 lb-ft of torque. The additional airflow offered by the ported TPI induction improved power through the entire curve, but note that the shape of the curve was unchanged. The fact that the two systems shared identical runner length ultimately limited the available power gains.
Swapping out the TPI system for conventional carburetion offered a dramatic change in the power curve. Measured peak to peak, the Speedmaster intake and Holley carb combo offered considerably more peak power (502 hp vs 451 hp), but torque production suffered below 4,800 rpm. The long runners employed on the TPI system were designed to enhance low-speed torque production and the extra 50 hp offered by the carburetion cost 50 lb-ft down low”
Did he say how much material was removed in the extrusion process?
I didn’t see anything about how much material, but it gained 50 cfm per runner.
