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Search found 1352 matches

by travis
Fri Jun 11, 2021 3:14 am
Forum: Engine Tech
Topic: Heavy carbon buildup removal
Replies: 12
Views: 706

Re: Heavy carbon buildup removal

I didn’t even think about drain cleaner…but some oven cleaners seem to work pretty well
by travis
Thu Jun 10, 2021 2:35 pm
Forum: Engine Tech
Topic: How to select the right carb boosters?
Replies: 32
Views: 1837

Re: How to select the right carb boosters?

Interesting. And I don’t disagree with you…while I’ve never done dyno testing I have swapped multiple carbs in plenty of different applications and never felt any huge SOTP difference…even when using something like a 750 on a nearly stock 350 or 351 in a heavy truck.
by travis
Thu Jun 10, 2021 2:04 am
Forum: Engine Tech
Topic: Pick a head, any head.
Replies: 24
Views: 932

Re: Pick a head, any head.

Holding it back, how? My opinion fwiw…I think your combo has too much emphasis on upper midrange and top end power for the weight, gearing, aerodynamics, etc. That combo would be an absolute rocket in a nova or something…in a heavy truck the weight just sucks the life out of it and the reduced low e...
by travis
Wed Jun 09, 2021 11:05 pm
Forum: Engine Tech
Topic: How to select the right carb boosters?
Replies: 32
Views: 1837

Re: How to select the right carb boosters?

In my mind, for there to be anywhere near that kind of power difference, the carb that’s making that much less power just has problems. On a typical 350-ish cube V8 making roughly 1hp/ci(this is going to be a pretty mild build), there wouldn’t be 50hp difference going from a decent 750 to a Holley ...
by travis
Wed Jun 09, 2021 7:32 am
Forum: Engine Tech
Topic: Offenhauser intake manifolds
Replies: 28
Views: 988

Re: Offenhauser intake manifolds

When was the last time if at all you saw a motor running one of these that impressed you? I know, I came up with zero also! The ONLY thing I have ever seen an Offy intake on was old stuff at car shows…flatheads, early olds, Buick nail heads, etc. I don’t remember ever riding in anything with an Off...
by travis
Wed Jun 09, 2021 6:57 am
Forum: Engine Tech
Topic: How to select the right carb boosters?
Replies: 32
Views: 1837

Re: How to select the right carb boosters?

BLSTIC wrote: Wed Jun 09, 2021 6:36 am I would have thought that on a street engine you'd want all the vaporization and low speed manners you could get and damn the 15hp (or whatever) it costs.
In this situation it’s more than a 15hp difference…it feels more like 50. Seriously.
by travis
Wed Jun 09, 2021 6:48 am
Forum: Engine Tech
Topic: Offenhauser intake manifolds
Replies: 28
Views: 988

Offenhauser intake manifolds

I’m curious if any of the Offy street manifolds are any good…especially considering that the finish on them is pretty rough and they cost considerably more than any known decent street type manifolds from weiand or edelbrock. Certain intakes like their 300 I6 ford manifolds seem pretty popular but t...
by travis
Mon Jun 07, 2021 5:47 am
Forum: Engine Tech
Topic: How to select the right carb boosters?
Replies: 32
Views: 1837

Re: How to select the right carb boosters?

The reason I ask is because out of 3 different carbs I’ve tried on one of my trucks, the 650 annular is definitely weaker performance wise than a 670 straight leg or a 750 edelbrock. It’s not a small difference either. I’m wondering if maybe I should try a 750 annular. A/F ratios are fine. This is o...
by travis
Wed Jun 02, 2021 5:36 am
Forum: Engine Tech
Topic: Heavy carbon buildup removal
Replies: 12
Views: 706

Heavy carbon buildup removal

I’m working on a couple different projects with stock iron intakes that will retain a functional exhaust crossover. Both also have the typical sheet metal shield underneath the plenum in the valley area that are packed full of heavy cooked oil deposits. I’m spending way too much time drilling, chise...
by travis
Wed Jun 02, 2021 5:27 am
Forum: Engine Tech
Topic: How to select the right carb boosters?
Replies: 32
Views: 1837

How to select the right carb boosters?

Are there any rules for picking the right style carb booster? Does one style work better in certain applications than the others?
by travis
Thu May 27, 2021 2:19 pm
Forum: Engine Tech
Topic: RHS 200cc iron heads with 50cc chambers
Replies: 12
Views: 771

Re: RHS 200cc iron heads with 50cc chambers

Be aware that if the small 50cc chamber volume was achieved by milling the head the VTP clearance will be a lot LESS than another typical sbc head. Something to check. I’m assuming the factory achieved a 50cc volume by milling a 64cc head, but I don’t know for sure. Since I’m going to have to use a...
by travis
Thu May 27, 2021 7:20 am
Forum: Engine Tech
Topic: RHS 200cc iron heads with 50cc chambers
Replies: 12
Views: 771

RHS 200cc iron heads with 50cc chambers

I picked up a new set of these bare from Gary C, and am about ready to start building. I need to order valves…don’t these typically use a +.200” valve? I’m thinking somewhere around 1.800-1.850” installed heights. I’m planning on using these on a 10.5-1 or so 385” sbc that peaks around 6200-6500 rpm...
by travis
Tue May 25, 2021 3:40 pm
Forum: Engine Tech
Topic: Whiplash, Thumper, Bootlegger etc cams
Replies: 27
Views: 1830

Re: Whiplash, Thumper, Bootlegger etc cams

I have always wanted to try this cam in something. Crane Energizer 274 H06. 218/218 @.050, .450 lift, 106 lsa. Should be great for having your sound and good manners too. Summit seals their copy of it for $95. I’ve used the 274H06 (and copies) in probably a dozen builds for other people over the ye...
by travis
Tue May 25, 2021 3:31 pm
Forum: Engine Tech
Topic: Whiplash, Thumper, Bootlegger etc cams
Replies: 27
Views: 1830

Re: Whiplash, Thumper, Bootlegger etc cams

I'm running a Vortec head 350 SBC, maybe 9.0:1 compression (stock dished pistons with 64 cc chambers), with a Thumper cam (smallest of the bunch) and a dual quad Edelbrock RPM intake, headers and dual exhaust. Trans is a TH350 with a shift kit with a 2500 stall convertor with a lock up. This is in ...
by travis
Tue May 25, 2021 5:09 am
Forum: Engine Tech
Topic: Chassis dyno losses - please critique my thinking.
Replies: 24
Views: 1002

Re: Chassis dyno losses - please critique my thinking.

At steady speed the parasitic losses should be almost identical. Parasitic losses should also be the same if both are accelerating at the same controlled rate. In a vehicle running down the road at WOT however, the higher Hp engine will have more parasitic losses because it will accelerate all the d...