05-14-2017, 02:05 AM | #81 | |
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Re: Horsepower
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05-14-2017, 02:36 AM | #82 |
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Re: Horsepower
Speaking of scavenging..........In high school my neighbor had a 2 cycle 250 Zundap motorcycle, and one day decided to run it with the exhaust completely removed. It wouldn't even start until he put the exhaust pipe back on.
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05-14-2017, 07:11 AM | #83 |
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Re: Horsepower
You are on the right track, ...the R&D that comes from Jr. Drag racing and Garden Tractor pulling is most closely aligned to what a Model-A/B needs over what you do to a SBC engine.
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05-14-2017, 03:55 PM | #84 |
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Re: Horsepower
Go to modelaparts.net and look at dennis piranio's site. Complete Dino results on modifications to his engines
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05-14-2017, 04:40 PM | #85 |
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Re: Horsepower
77 horses on the dyno. 77.7 miles an hour at Pendine through a 3.54 rear end. Turns out she runs low 19's at 64mph at Santa Pod.
https://www.youtube.com/watch?v=QgpS3SL0Scw |
05-14-2017, 10:42 PM | #86 |
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Re: Horsepower
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Terry |
05-14-2017, 11:45 PM | #87 | |
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Re: Horsepower
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05-15-2017, 01:18 AM | #88 |
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Re: Horsepower
Yup I'd agree Brent. Only useful to compare cars on the same dyno. Some of them horses can be just ponies. We had half a dozen cars on a new rolling road so had a comparison.
As for the spec of mine, +60, Winfield head, 1.7" inlets, ported, 97 on a snyders manifold, Reds header, and a cam ground by a local stock car racer. |
05-15-2017, 01:19 AM | #89 |
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Re: Horsepower
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05-15-2017, 07:27 AM | #90 |
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Re: Horsepower
1)Brent, Thanks for clearing that up. I think we all fall into the trap of thinking that horsepower is absolute under all conditions now and then. There are a lot of variables.
2) I have to correct one thing I said. That I didn't know what cam grind Piranio's was using. It's a stock grind, I missed it and found it later. 3)In scanning the numbers, I found there is some small improvement in just boring the manifold to B sizes. It's probably barely noticeable when driving but improvement is improvement. Terry |
05-15-2017, 07:54 AM | #91 |
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Re: Horsepower
I have 31 Tudor, changed 3:78 to 3:27 in 2001, 2003 added Brumfield 5.9 head, Mitchell overdrive 26.7 % , Weber carb. In 2008 inserted engine, added cam, installed v8 clutch, took off 26 lbs on flywheel. I have been running electronic ign in both my 29 roadster and Tudor since 2000. Have Aeries muffler , do not run headers. I produce 65 hp on Dyno. Have fun modelAtony Lafayette, LA
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05-15-2017, 12:37 PM | #92 | |
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Re: Horsepower
Quote:
Terry, the thing you mention that also factors into this is; "who's" stock cam? Even when an original camshaft is reground back to stock lift by grinding off the heal, the duration is affected. Dennis is a pretty sharp cookie, and while I am certain he probably does not remember me, we actually raced together back in the late 70s & early 80s on a match-race circuit called the All American Funny Car Circuit, and in Div 4 Pro Comp. He was making big horsepower even back then. As for the manifold modifications, the tube size will affect two areas, ...low end and WOT. You would have better throttle response with a stock manifold but better WOT air-flow with an enlarged tube. This all goes back to the golf ball effect. Listen, this is always a fun topic to dream about, but the practicality of building a high-horsepower engine begins to fade once the numbers start creeping into triple digits. Again, fun but expensive and not for the typical hobbist's car. |
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05-15-2017, 05:12 PM | #93 |
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Re: Horsepower
Oh It is, it is! Lots of fun to fantasize about till one get's the bills. Gee it's still only a 4 banger and without a lot more $ we aren't even going to hit the 100HP mark when the smallest of small SBC starts off with more than that. My problem is that I just want to keep up with the traffic around here. Pa,s got a lot of 1 lane roads with NO shoulders and many of them are either going up a hill or down a hill and the 40 hp sometimes just doesn't cut it. And now and then I have to get out on the Interstate for a couple of miles. That can be exciting! As I don't want to buy the mods that would clearly get me past this dilemma, I am pretty much limited to cheap , invisible mods, like grinding the head (Or getting a Snyder's), porting and polishing, B carburetors. 10-12#s off the fly wheel. So with minimal HP gain my coupes can once again, attack the steeper hills. And I'm thanking Henry for the torque that long stroke is producing.
Terry Listen, this is always a fun topic to dream about, but the practicality of building a high-horsepower engine begins to fade once the numbers start creeping into triple digits. Again, fun but expensive and not for the typical hobbist's car.[/QUOTE] Last edited by Terry, NJ; 05-15-2017 at 05:17 PM. |
05-15-2017, 09:04 PM | #94 |
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Re: Horsepower
My car was clocked going 67 on the flat straights this weekend, and I didn't even have it on the floor, just cruising.
And she's all stock..and fast enough for me.
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Keith Shawnee OK '31 SW 160-B |
05-16-2017, 05:06 AM | #95 |
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Re: Horsepower
http://www.modelaparts.net/engine%20...m/engines.html
You can choose between a touring engine 54hp and a super touring 79hp. The cams seem good. |
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