Are all '84's dogs??
08-24-2003, 04:30 PM
#81
Re: Are all '84's dogs?? (Dominic Sorresso)
Hi Dominic,
Good to see you here! My mods are:
Port matched manifold, only a small amount of porting in the runners
improved fuel pump (similar to '85)
VAFPR
cold air mod
'cleaned up' 89 '113 L98 heads
208/215 @ .050 .459/.480 cam
Comp cams 1.6:1 roller tip rockers
Dual 2.5" mandrel bent exhaust with X-Pipe no cat
Tri-Y headers
Stock ECM (have burnt a few chips, but had the stocker in for the 13.7@100)
Transgo shift kit
RHD ;-)
Do you have before and after flow figures for you extrude honed manifold?? I plan to put a 383 together soon, I have a pair of 2"TB's and 454 injectors ready to go. I am looking at improving the manifold and would love to stick with the original .. just to prove a point ;-)
Ben.
[Modified by ben73, 9:37 PM 8/24/2003]
Good to see you here! My mods are:
Port matched manifold, only a small amount of porting in the runners
improved fuel pump (similar to '85)
VAFPR
cold air mod
'cleaned up' 89 '113 L98 heads
208/215 @ .050 .459/.480 cam
Comp cams 1.6:1 roller tip rockers
Dual 2.5" mandrel bent exhaust with X-Pipe no cat
Tri-Y headers
Stock ECM (have burnt a few chips, but had the stocker in for the 13.7@100)
Transgo shift kit
RHD ;-)
Do you have before and after flow figures for you extrude honed manifold?? I plan to put a 383 together soon, I have a pair of 2"TB's and 454 injectors ready to go. I am looking at improving the manifold and would love to stick with the original .. just to prove a point ;-)
Ben.
[Modified by ben73, 9:37 PM 8/24/2003]
08-24-2003, 06:01 PM
#83
Le Mans Master
Re: Are all '84's dogs?? (ben73)
Ben,
Well done. No I don't have the flow numbers for the EH manifold. Ken Kelly had done some flowbench work on a port matched Xfire that suggested runners would flow at 200CFM. EH says their process will improve flow by up to 30%. Let's say its 10%, that would put the EH manifold at 220cfm. 20% at 240cfm. My experience says that the manifold provides enough air to feed the 195cc runners I have on the TFS 23d heads. Of course that's also dependent on the cam profile and the rpm range you are operating in. I wouldn't suggest the Xfire and EH would handle a 69 Z-28 motor at 7000rpm. But when I increased the rocker ratio to 1.6, it moved the power peak from 4300 to 4850rpm. The torque peak increased to 3850rpm up about 400rpm. So it seems to be able to pass more air when I need it. I haven't tuned the motor yet for the rockers and the additional spark advance. But the last dyno run showed a minimum of 300lbft @2000rpm up through 5000rpm. Peak was 347lbft at the rear wheels. There's absolutely no bog and no lugging down to 1200rpm in 4th. I highly recommend it but I don't have anything better than anecdotal evidence of its value. Since you're planning on putting in the 90# injectors using the Xfire manifold, I would strongly recommend parallel plumbing the TB's. You might want t try the 80# instead. My understanding is that they tune better than the 90's. I had both.
Well done. No I don't have the flow numbers for the EH manifold. Ken Kelly had done some flowbench work on a port matched Xfire that suggested runners would flow at 200CFM. EH says their process will improve flow by up to 30%. Let's say its 10%, that would put the EH manifold at 220cfm. 20% at 240cfm. My experience says that the manifold provides enough air to feed the 195cc runners I have on the TFS 23d heads. Of course that's also dependent on the cam profile and the rpm range you are operating in. I wouldn't suggest the Xfire and EH would handle a 69 Z-28 motor at 7000rpm. But when I increased the rocker ratio to 1.6, it moved the power peak from 4300 to 4850rpm. The torque peak increased to 3850rpm up about 400rpm. So it seems to be able to pass more air when I need it. I haven't tuned the motor yet for the rockers and the additional spark advance. But the last dyno run showed a minimum of 300lbft @2000rpm up through 5000rpm. Peak was 347lbft at the rear wheels. There's absolutely no bog and no lugging down to 1200rpm in 4th. I highly recommend it but I don't have anything better than anecdotal evidence of its value. Since you're planning on putting in the 90# injectors using the Xfire manifold, I would strongly recommend parallel plumbing the TB's. You might want t try the 80# instead. My understanding is that they tune better than the 90's. I had both.
