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Search found 899 matches

by PRH
Sat Nov 14, 2020 10:49 am
Forum: Engine Tech
Topic: Healthy 355
Replies: 28
Views: 1527

Re: Healthy 355

I found a sheet from the one I did... Same cam(in a different box), Was that this cam? With 1.6 rockers. Lunati bare bones flat tappet 224/234 Duration at .050". 112 Degree Lobe Separation Angle. 0.465"/0.488. It would have been either a Melling(22303)or Elgin(E-1015-P) equivalent.....aka, the “whi...
by PRH
Fri Nov 13, 2020 5:54 pm
Forum: Engine Tech
Topic: Healthy 355
Replies: 28
Views: 1527

Re: Healthy 355

I found a sheet from the one I did.......
I was wrong on the header size...... I used 1-5/8 x 3.
The intake was an RPM A/G.
8A57CAAC-29F5-4B36-A2AA-1D1AC95269B2.jpeg
by PRH
Fri Nov 13, 2020 5:18 pm
Forum: Engine Tech
Topic: Healthy 355
Replies: 28
Views: 1527

Re: Healthy 355

I don’t know that I still have the sheets for that particular one I did.......
But I’m thinking it was right around 6000 or so.
by PRH
Fri Nov 13, 2020 3:12 pm
Forum: Engine Tech
Topic: Healthy 355
Replies: 28
Views: 1527

Re: Healthy 355

Ages ago I built a very similar .020” over 350, flat tops, zero deck. Same cam(in a different box), also used 1.6 rockers. Pro-Action 200cc iron heads, rpm intake, dynoed with 1-3/4 — 1-7/8 x 3 step headers, 750 carb. Made about 385-390hp as I recall, and with the 200cc heads peaked fairly high for ...
by PRH
Wed Nov 11, 2020 3:17 pm
Forum: Engine Tech
Topic: 80’s era 351w heads
Replies: 22
Views: 781

Re: 80’s era 351w heads

https://speedmaster79.com/Ford-SB-289-3 ... inder-Head

Hard to justify messing with 30-40 year old smogger heads for that price.
by PRH
Tue Nov 10, 2020 2:51 pm
Forum: Engine Tech
Topic: BBC heads question
Replies: 8
Views: 325

Re: BBC heads question

Coming at it from a different angle....... If you had the car still up and running, and did nothing but unbolt the 335 heads and replace them with the 385’s....... I think the car would slow down(poorer ET). I can easily see where 850hp, STP corrected on the dyno, could end up running 144mph@3400lbs...
by PRH
Sat Nov 07, 2020 10:27 am
Forum: Engine Tech
Topic: Weak part throttle performance
Replies: 41
Views: 1178

Re: Weak part throttle performance

I usually wince when I hear “Hughes converter”.
by PRH
Fri Nov 06, 2020 10:57 am
Forum: Engine Tech
Topic: Weak part throttle performance
Replies: 41
Views: 1178

Re: Weak part throttle performance

I think that is the same approach used on the 6.0 you have...small wide lsa cam, with good flowing heads. From what I can find, the stock LQ4 6.0 cam has a 116lsa. The stock 351w HR cam has a 115.5lsa, in at 118. I think the converter is the first thing I’d change though. Just put in an OE replacem...
by PRH
Thu Nov 05, 2020 5:24 pm
Forum: Engine Tech
Topic: Weak part throttle performance
Replies: 41
Views: 1178

Re: Weak part throttle performance

To put the cam size into perspective....... for something that will need to retain its truck worthiness ........ I have a 2004 Silverado 2500HD 4wd, listed as having a curb weight of 5400lbs. 6.0, 4.10’s, factory converter stalls 2500........the stock cam is 196/207. This is pre-mds and pre-vvt. For...
by PRH
Thu Nov 05, 2020 11:11 am
Forum: Engine Tech
Topic: Weak part throttle performance
Replies: 41
Views: 1178

Re: Weak part throttle performance

If the converter flashes to 3200....... imo, it’s too loose. For “truck” type duty, I think both the heads and cam are a tad too big. I wouldn’t think a combo like that would be all that happy at part throttle cruise with mid-high 14’s AF ratios. I’d go up in jets a bit and gauge the effectiveness o...
by PRH
Tue Nov 03, 2020 4:44 pm
Forum: Engine Tech
Topic: Budget 350 RV build
Replies: 16
Views: 614

Re: Budget 350 RV build

I’d probably see if he was willing to spring for some of the SR type Dart heads with the 1.94/1.50 valves.

Do some very minor clean up in the bowls, and recut the seats, hone the guides, etc.
by PRH
Tue Nov 03, 2020 2:57 pm
Forum: Engine Tech
Topic: Budget 350 RV build
Replies: 16
Views: 614

Re: Budget 350 RV build

What heads are on it?

Some of those factory 80’s heads leave a lot to be desired.

If the owner doesn’t want to part with much $$$$, I’d say the power gains will end up being pretty small.
by PRH
Tue Nov 03, 2020 10:33 am
Forum: Engine Tech
Topic: Cracked seats
Replies: 6
Views: 425

Re: Cracked seats

On the other hand........

Depending on what it’s being used on........ if it pressure tests good as is........ you could just keep running it.
by PRH
Tue Oct 27, 2020 12:04 pm
Forum: Engine Tech
Topic: 70’s-80’s era low rise single plane intakes
Replies: 19
Views: 1043

Re: 70’s-80’s era low rise single plane intakes

As has already been stated, the old Torkers and Street Dominators worked pretty well on the BB Mopars. The few intakes I’ve tried where I really thought they just didn’t do anything well were some of the Offy “360” single planes, and the “dual port 360”. However, the worst experience I had with an i...
by PRH
Mon Oct 19, 2020 1:18 pm
Forum: Engine Tech
Topic: Budget 385sbc upgrades...too much compression?
Replies: 17
Views: 1032

Re: Budget 385sbc upgrades...too much compression?

Probably would have been happier with it by just howl porting the SR heads and installing a nice little SFT cam package.