Edelbrock high-flo runners tpi worth an upgrade?
02-25-2015, 06:30 PM
#1
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Car: 1991 Z28 Convertible
Engine: 305 TPI
Transmission: 5 speed
Axle/Gears: 3.55
Edelbrock high-flo runners tpi worth an upgrade?
How much HP would you expect to gain over stock runners?
02-25-2015, 08:19 PM
#2
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Car: 85 Iroc-Z
Engine: 383 TPI Procharger D1SC
Transmission: TKO600
Axle/Gears: Strange S60 3.73
Re: Edelbrock high-flo runners tpi worth an upgrade?
Check out this article.
http://xtremecarzone.com.au/index.php?showtopic=386
http://xtremecarzone.com.au/index.php?showtopic=386
02-25-2015, 11:48 PM
#4
How much to expect over stock runners? On a stock engine with no other modifications, very little on a 350 and even less on a 305. Not worth the $400 if that's all your doing to the engine.
Add larger runners, ported ones are even better, with and aftermarket base (again ported even better) and ported plenum you'll see better gains. If done right the engine will breath better at higher rpm where stock tpi don't. Add a cam and tune and the runners have now become a better deal.
Now look at all the porting and money spent and the holley stealth ram does the same or better for less money. Not saying you shouldn't stick with a long runner manifold, just saying if you head down that road the hsr would be cheaper and worth a look.
Add larger runners, ported ones are even better, with and aftermarket base (again ported even better) and ported plenum you'll see better gains. If done right the engine will breath better at higher rpm where stock tpi don't. Add a cam and tune and the runners have now become a better deal.
Now look at all the porting and money spent and the holley stealth ram does the same or better for less money. Not saying you shouldn't stick with a long runner manifold, just saying if you head down that road the hsr would be cheaper and worth a look.
02-26-2015, 11:16 PM
#5
Re: Edelbrock high-flo runners tpi worth an upgrade?
How much to expect over stock runners? On a stock engine with no other modifications, very little on a 350 and even less on a 305. Not worth the $400 if that's all your doing to the engine.
Add larger runners, ported ones are even better, with and aftermarket base (again ported even better) and ported plenum you'll see better gains. If done right the engine will breath better at higher rpm where stock tpi don't. Add a cam and tune and the runners have now become a better deal.
Now look at all the porting and money spent and the holley stealth ram does the same or better for less money. Not saying you shouldn't stick with a long runner manifold, just saying if you head down that road the hsr would be cheaper and worth a look.
Add larger runners, ported ones are even better, with and aftermarket base (again ported even better) and ported plenum you'll see better gains. If done right the engine will breath better at higher rpm where stock tpi don't. Add a cam and tune and the runners have now become a better deal.
Now look at all the porting and money spent and the holley stealth ram does the same or better for less money. Not saying you shouldn't stick with a long runner manifold, just saying if you head down that road the hsr would be cheaper and worth a look.
02-27-2015, 09:38 AM
#7
There's no way I'd buy the edelbrock stuff new. If someone wants to stay with original style tpi or needs to stay egr etc compliant then the classified boards are the place to look. Ported aftermarket stuff has been popping up all the time lately. Even then a hsr comes up cheaper and more effective.
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