Experts: Runner length and volume?
01-07-2005, 08:37 PM
#51
Platinum Member
Platinum Member
Re: Experts: Runner length and volume?
Originally Posted by kennywould
Hehe...your killing me Smitty! John doesn't know it's missing yet! yep, runnin a 96/272 Baja, I seem to have a problem with the haul, haven't busted 80 yet! Should start another thread for this maybe? Do you talk as fast as you type? 
-Ken
-Ken
,motor has 140 hours(2 seasons) on it,i'm freshening it this winter and changing cam,putting afr cnc's on it and bigger injectors and doing something with intake(still undecided),Smitty
01-07-2005, 08:40 PM
#52
Registered
Re: Experts: Runner length and volume?
That makes sense GPM. I had a buddy that ran a 900 HP NA 632" (pump gas) and he ran a Dart tunnel ram. It was fully hand ported probably to get the intake to match his 420 CFM intake ports. So are you going to tell us what was different on the motors between the earlier mentioned dyno pulls? I am assuming you know the answer and are just testing us. Maybe it is the differance between an older Procharger vs the M5. Give us a hint!! 
Hey JIMV,
Ever flow heads with an intake bolted up and is it even possible?
Craig
Hey JIMV,
Ever flow heads with an intake bolted up and is it even possible?
Craig
01-07-2005, 08:55 PM
#53
Re: Experts: Runner length and volume?
It was the same motor, blower belt started slipping on the 1200hp one, slowed the blower down for the 1372. Imagine a cog system. We always check head flow through the manifold looking for restriction.
01-08-2005, 09:31 AM
#54
Registered
Re: Experts: Runner length and volume?
Originally Posted by WETTE VETTE
That makes sense GPM. I had a buddy that ran a 900 HP NA 632" (pump gas) and he ran a Dart tunnel ram. It was fully hand ported probably to get the intake to match his 420 CFM intake ports. So are you going to tell us what was different on the motors between the earlier mentioned dyno pulls? I am assuming you know the answer and are just testing us. Maybe it is the differance between an older Procharger vs the M5. Give us a hint!!
Hey JIMV,
Ever flow heads with an intake bolted up and is it even possible?
Craig
Hey JIMV,
Ever flow heads with an intake bolted up and is it even possible?
Craig
01-08-2005, 11:13 AM
#55
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Re: Experts: Runner length and volume?
Chris:
Sorry for the delay the block is up at Roush in Detroit right now and they will be done with it on the 24th. I will get it to you then and you can start on our new trick oil pan.
Thanks for reminding me. so damn busy!
Regards,
Ray @ Raylar
Sorry for the delay the block is up at Roush in Detroit right now and they will be done with it on the 24th. I will get it to you then and you can start on our new trick oil pan.
Thanks for reminding me. so damn busy!
Regards,
Ray @ Raylar
01-09-2005, 11:04 AM
#56
Re: Experts: Runner length and volume?
Originally Posted by articfriends
GPM,what kind of fuel injection are you running,what are you controlling it with,who programmed it?What are you running for a innercooler and what kind of plumbing are you using to get air into intake,can you post a pic? I am upgrading my heads this winter and am looking for induction ideas to replace my 502 mag intake and fuel injection. I am running m-3sc on 540 blowing thru stock 502 mpi intake. What size injectors are you running and what kind of fuel pumps? What kind of hull are you running this in and what kind of drives? How good does it idle,are you running dry exhaust? Thanks,Smitty
Last edited by GPM; 08-05-2007 at 04:42 PM.
01-11-2005, 10:22 AM
#58
Registered
Re: Experts: Runner length and volume?
Originally Posted by Raylar
On the question about taper in the runners. Runners should taper approximatly 2% per inch of runner length from the opening towards the valve on a constant smooth basis if possible. This will increase velocity and the ram effect. As for which benefits more, runner redirection is more critical in a wet( carburated) manifold, because when wet air changes direction(curves) it will let more fuel drop out of suspension. Remember fuel (heavier) and air don't weigh the same and hence change directions at different speeds. The runner length determines where the rpm power band of a manifold will be and the taper helps develop the speed of the charge.
Ray @ Raylar
Ray @ Raylar
In simple terms, the taller the intake (tunnel ram) the higher (rpm) the power band?
01-12-2005, 01:45 AM
#59
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Re: Experts: Runner length and volume?
No , not neccessarily. A taller tunnel ram with longer runners of the same area or size as a shorter tunnel ram would tend to have its max power at a lower rpm with more torque.
Longer runners generaly develop power at lower rpms and at very high rpms they tend to restrict the engines breathing ability and is obviously camshaft size and duration dependant.. Your intake, cam and exhaust system has to be tailored to where you want your power band.
Ray @ Raylar
Longer runners generaly develop power at lower rpms and at very high rpms they tend to restrict the engines breathing ability and is obviously camshaft size and duration dependant.. Your intake, cam and exhaust system has to be tailored to where you want your power band.
Ray @ Raylar
