What is the best baseplate and runners for the tpi?

 

ACCEL or Edelbrock is your best bet for base plates... there the same thing... i think accel are just re badged... and the runners id say SLP, ACCEL, or Edelbrock...

I plan on doin a complete edelbrock kit

 

Large tube runners? AS&M for sure.

 

Actually, the FIRST would be the best. But it requires small-cap distributor and custom fuel connections.

Though not strictly long-tubes, consider the SuperRam as a comparable option -- but it's got mounting challlenges. OTOH, it retains EGR function if you need it.

AS&M would be next -- using and Accel or Edelbrock baseplate. Though I've heard castings are supposed to be the same, feedback from other forum members pointed to the possibility that the Accel might be a hair bitter (inside). You could also check with TPIS to see if their base includes any porting. If so, consider their Big Mouth base.

Accel/TPIS runners would be close to the AS&M. For me, it would come down to the best price.

SLP's are unique. They typically don't trap as well (in cast form). I believe it may be obstructions in the tubes. Their mounting bosses protrude into the runners. Since they don't improve 1/4 mile times as much as the others, it might be due to these semi-obstructions. OTOH, they cost the least and still provide improvement. And, they are the only runners you can significantly siamese. Siamesing raises the rpm ceiling to combat the TPI wall. I believe it's possible that mega-ported, siamesed SLP's could perform better than the AS&Ms -- moving them into 3rd place. But, the FIRST and SuperRam would always be the best.

All of this assumes you want fastest 1/4 mile times. Beyond that you have to understand tube-length and wave tuning to consider where you want the power band. Finally, the BBK "turtle ram" might surface one of these days.

 

AS&M runners and an Accel base, the TPiS base is actually an edelbrock that has been cleaned up.

 

You've seen FIRST intakes with faster drag times then AS&M large tubes?

 

What letter could we add to "BBK" to make it a "four letter word?"

But seriously, what makes AS&M runners so great? They seem hard to find.

 

I've seen dyno's where they outperformed the ASMs. They have about 500rpms higher ceiling than ASM's w/o sacrificing low-end power.

Their tube size is bigger (than ASMs), their transition is better, their base is bigger, and they'll have a higher rpm ceiling. And, this happens w/o losing any low-end power. Computer simulations show them to be better.

A track comparison has shown the FIRST intake to be within a tenth of an HSR (in the FIRST thread). I've had someone PM me that the superram and FIRST were as identical in the 1/4 mile.

That's better than ASM's IMO.

 

How 'bout we've all been BBK'd to death! Is that four letters?!!!

I believe someone in TGO compared (or found a comparison) where the ASM's performed slighty better. I've seen them reported as .2 tenth's faster than SLP's. And, one tenth faster than TPIS/ACCEL.

Another member of this forum confirmed ASM's as faster than his 1996 vintage SLPs. But, I'm seeing where their castings were worse back in that time-frame. By that, I mean their inner tube shape.

 

Maybe this comparison would help?

http://www.compcams.com/Community/Ar...?ID=1737510521

 

Great Link! Should be a sticky, but I wish they had done these comparisons on a 350.

 

Me too!

But still, you can see the basic difference between intakes. Some flow better than others

 

don't worry about brands. Worry about style like
long runner 2.59 -3.07-3.54 gears
short runner 3.54-3.73-4.11 gears
what do you need more of, and what do you have.
IMHO

 

what about the edelbrock hi-flo runners ?

 

Read the test behind that link in post #10

 

Edelbrock ---> 25 HP ! Not bad at all !!!!!!! that's a lot !

 

What do you have on the other end, exhaust wise?

What goes in must come out?

TJM

 

And with siamesed runners 54 hp. That's even more!

The good thing about Edelbrock is, that there's plenty of material for porting, which would definitely improve it's capability.

 

where t.f. can i get siamesed runners ?????????????????????????????????
so are you saying that ...siamesed runners + hi flo base = 54 HP ?

Are the siamesed runners the AS&M only ?
The SLP looks siamesed too

 

SLP's are the only factory siamesed runners. Even then they aren't siamesed nearly enough to make the improvement shown in the intake comparison (on the ASMs).

If you want significantly siamesed runners, you need to grind them out yourself or send them to a porter. You also need to understand the effect and limitations of how runner-length changes affect the torque/power curve. Re-read the intake comparison if you're still not sure.

And, if your goal is best horsepower or 1/4 mile speed, you need to look at other intakes.

You also need to realize the size of gains seen in this comparison are due to the size/potential of the motor. Gains won't be as high on a stock motor.

gp