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Afr 195 eliminator heads I just wanted to display how good these afr 195 heads are. I purchased them last fall. Finally this spring I got to use them and race my car. I have a mild 385 sbc eith a xr288hr cam, victor jr intake, 750 carb, 4.10 gear, ptc 5k stall. All motor and a 3400lbs race weight street strip camaro. Right out of the Box these heads where beautiful the craftsmanship was amazing, they looked like you would want to display them on the wall. Bolt up was easy, and customer support was perfect. I made 3 passes so far with the heads with a best of a 10.73@125mph. 1.48 60 foot. I purchase these from summit racing but I highly recommend them for anybody with a mild small block Chevy. I never thought I would go this fast with A 195 head. https://cimg6.ibsrv.net/gimg/www.thi...08145a2d26.jpg https://cimg8.ibsrv.net/gimg/www.thi...13c6d6ad8d.jpg |
Re: Afr 195 eliminator heads Damn! That is really fast! How does the car idle? |
Re: Afr 195 eliminator heads
Originally Posted by Manic Z
(Post 6223075)
Damn! That is really fast! How does the car idle? Idles great, a bit lopey but manageable driving it arround kn the road. in car vid idle clip when I was first tuning it. |
Re: Afr 195 eliminator heads Exhaust sounds great! What is it? |
Re: Afr 195 eliminator heads
Originally Posted by Manic Z
(Post 6223242)
Exhaust sounds great! What is it? has Doug's long tube 1 3/4 headers and dual 2 1/2 inch collectors and cut outs right now. No mufflers. Loud on the road... I have race mufflers to toss on still |
Re: Afr 195 eliminator heads That's some good vacuum with that cam.:thumbsup: |
Re: Afr 195 eliminator heads
Originally Posted by fasteddi
(Post 6223008)
a xr288hr cam,
Originally Posted by Manic Z
(Post 6223075)
How does the car idle?
Originally Posted by Jorlain
(Post 6223398)
That's some good vacuum with that cam... Well done Eddi. I've always liked your car. Something mine will eventually morph into as I get away from mostly street to being mostly strip. |
Re: Afr 195 eliminator heads
Originally Posted by fasteddi
(Post 6223263)
has Doug's long tube 1 3/4 headers and dual 2 1/2 inch collectors and cut outs right now. No mufflers. Loud on the road... I have race mufflers to toss on still How far past the header flange are your cutouts? |
Re: Afr 195 eliminator heads One of the best street strip bolton ready heads out imo. Price has gone up over the yrs but most things have anyway. They just make power tho Your setup is really moving good for the parts. I had slightly smaller duration cam but more lift in my 383 with afr 195’s. It went 11.47 at 118 with best of 119 mph in summer air. Stealth ram intake. Wasnt as racey tho with just 3.42 gears and 3600 stall |
Re: Afr 195 eliminator heads
Originally Posted by skinny z
(Post 6223401)
Have the 288 in my 355. Idle vacuum is about 12" with vacuum advance on manifold and about 28° of idle timing. And with a lean cruise tune I can manage better than 20 mpg on the highway. So you can be fast and economical if you really want to be... Well done Eddi. I've always liked your car. Something mine will eventually morph into as I get away from mostly street to being mostly strip. |
Re: Afr 195 eliminator heads
Originally Posted by skinny z
(Post 6223402)
Don't forget to address the correct tuned collector length. There's power and torque left on the table if you disregard it's impact. How far past the header flange are your cutouts? The cutouts are 14 inches past the header collector. I'm not positive if that's long enough as I've heard a lot of ideas about collector length. |
Re: Afr 195 eliminator heads
Originally Posted by Orr89RocZ
(Post 6223407)
One of the best street strip bolton ready heads out imo. Price has gone up over the yrs but most things have anyway. They just make power tho Your setup is really moving good for the parts. I had slightly smaller duration cam but more lift in my 383 with afr 195’s. It went 11.47 at 118 with best of 119 mph in summer air. Stealth ram intake. Wasnt as racey tho with just 3.42 gears and 3600 stall But keep in mind I ran 11.60s@115mph last year with ease and it was a very mild set up. Xe268 can, 3.23 gear, 3500 stall, old as cast 200cc dart iron heads. I was shifting at 5200 and trapping about 5000rpm. So my car must be set up pretty well. |
Re: Afr 195 eliminator heads
Originally Posted by Jorlain
(Post 6223479)
Even at 16° timing at idle, I'm barely pulling 12" with my 276HR at a reasonable idle speed. Makes me wonder. Idle speed with the 288 is about 800-850. With the 276, I managed a lower idle speed of around 750. I have the base timing set at 16° and my vacuum advance is all in at 8-9" vacuum which adds another 12-14° depending on my tune. |
Re: Afr 195 eliminator heads That seems really good for the 288 cam. Its not a small cam by any means |
Re: Afr 195 eliminator heads
Originally Posted by fasteddi
(Post 6223576)
So my car must be set up pretty well. And I'd like a set of the AFRs as well. They seem a perfect fit for 383 CID. |
Re: Afr 195 eliminator heads
Originally Posted by fasteddi
(Post 6223575)
The cutouts are 14 inches past the header collector. I'm not positive if that's long enough as I've heard a lot of ideas about collector length. 14 plus length of collector would be around 21-22” i guess? Depending what rpm you tune for, thats getting close to the “bad” length and just past ideal Ideal likely would be 17-18 from end of primary tubes to atmosphere cutout Might like 3” collectors too Best lengths are 16-18” or 33-35” |
Re: Afr 195 eliminator heads I haven't run PipeMax for a 383 so my 355 results won't necessarily be what's best but lengths are 19.3 and 38.5 for best torque. Best HP is 19.3 and 9.5". https://cimg6.ibsrv.net/gimg/www.thi...50c5035a68.jpg This is for a members engine here at Thirdgen and was spec'd with a short style header. I'll look to see if I don't have an archived 383 file buried somewhere. |
Re: Afr 195 eliminator heads Why shorty header? |
Re: Afr 195 eliminator heads
Originally Posted by Orr89RocZ
(Post 6223660)
Why shorty header? If fasteddi posts enough engine information, I could probably run it through the program. |
Re: Afr 195 eliminator heads Yeah i ran my old 383 thru an older version and got the lengths above |
Re: Afr 195 eliminator heads
Originally Posted by Orr89RocZ
(Post 6223653)
Thats not to bad to be honest 14 plus length of collector would be around 21-22” i guess? Depending what rpm you tune for, thats getting close to the “bad” length and just past ideal Ideal likely would be 17-18 from end of primary tubes to atmosphere cutout Might like 3” collectors too Best lengths are 16-18” or 33-35” 14 inches is from the collector flange to the cut out inlet flange itself. Its a short amount but just long enough that my widebands work good |
Re: Afr 195 eliminator heads Last year I went from hooker shortie headers 1 5/8 into the y pipe and 18 inches to a open cutout to these Doug long tube 1 3/4 headers and the exhaust I have now... went from running 11.90s@110mph to running 11.60s@115mph just like that did nothing else. Amazing if you ask me. |
Re: Afr 195 eliminator heads
Originally Posted by fasteddi
(Post 6223693)
Last year I went from hooker shortie headers 1 5/8 into the y pipe and 18 inches to a open cutout to these Doug long tube 1 3/4 headers and the exhaust I have now... went from running 11.90s@110mph to running 11.60s@115mph just like that did nothing else. Amazing if you ask me. I go back to the times when my headers were freshly installed and the car had to be "delivered" to the exhaust shop. Driving around, the headers open and nothing more than maybe a 6" long collector (primary tips to flange) and the engine was complete slug low in the RPM range. Post your specs as per below and I'll run it through for you. (If you're so inclined). https://cimg0.ibsrv.net/gimg/www.thi...70be3119a9.jpg
Originally Posted by fasteddi
(Post 6223693)
... went from running 11.90s@110mph to running 11.60s@115mph just like that did nothing else. Amazing if you ask me. |
Re: Afr 195 eliminator heads
Originally Posted by skinny z
(Post 6223694)
There may be more too depending on how close you are to optimum now. It's crazy how a few inches one way or another can make or break a combination. I go back to the times when my headers were freshly installed and the car had to be "delivered" to the exhaust shop. Driving around, the headers open and nothing more than maybe a 6" long collector (primary tips to flange) and the engine was complete slug low in the RPM range. Post your specs as per below and I'll run it through for you. (If you're so inclined). https://cimg0.ibsrv.net/gimg/www.thi...70be3119a9.jpg THAT is exactly the kind of result I'm hoping for once I get to that point. The single full length 3" exhaust is absolutely killing performance. A simple set of cutouts would be all that's needed to add similar improvements as you've had. 385 sbc 4.040 bore. 3.75 stroke. P2d .012 head gasket .027, quench .039, +5cc flat top pistons with 2 reliefs. Afr 195 heads 218 cfm exhaust 280cfm intake@.550 lift comp xr288hr cam. 288/294 adv. Duration. 236/242 dur at. 050. .555/.576 lift with 1.6 rocker. 110 lsa installed at 106 centerline. 11.0:1 compression, victor jr intake 2999 version which has 1 inch taller adapter built in, holley 750 carb with proform main body, double pumper mech. 2nds. |
Re: Afr 195 eliminator heads A few questions. Rod length? Peak HP RPM? If you have the valve sizes and stem diameter that'd be handy. Otherwise I'll look up stock AFR Eliminator specs (street version). |
Re: Afr 195 eliminator heads Based on a couple of assumptions: https://cimg2.ibsrv.net/gimg/www.thi...8111fe62a0.jpg https://cimg3.ibsrv.net/gimg/www.thi...e2e9b2ea2b.jpg Looks like a 3" + collector at 17.2" is the ticket. 8.6" for more HP (sometimes) 34.4" for best TQ. |
Re: Afr 195 eliminator heads
Originally Posted by skinny z
(Post 6223705)
A few questions. Rod length? Peak HP RPM? If you have the valve sizes and stem diameter that'd be handy. Otherwise I'll look up stock AFR Eliminator specs 6500(street version). |
Re: Afr 195 eliminator heads Do you think peak HP comes in about 6500? Maybe closer to 6000? |
Re: Afr 195 eliminator heads Dropping peak HP RPM down to 6000 stretches the collector to 18.6". Considering the worst case is about 28" there's some margin for a good result even if you're off by a couple of inches. |
Re: Afr 195 eliminator heads
Originally Posted by skinny z
(Post 6223713)
Do you think peak HP comes in about 6500? Maybe closer to 6000? I think closer to 6000-6200 would be peak hp. I may play with length next time out and just see what it does. 10hp or more is worth it. |
Re: Afr 195 eliminator heads I'd like to see that kind of test result. |
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