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Search found 7182 matches

by F-BIRD'88
Mon Jan 13, 2020 7:38 pm
Forum: Engine Tech
Topic: 4150 4778 Holley carb questions
Replies: 12
Views: 511

Re: 4150 4778 Holley carb questions

A prime candidate for a holley/proform HP 750 carb body upgrade.
by F-BIRD'88
Fri Jan 10, 2020 6:10 pm
Forum: Engine Tech
Topic: 1978 454 solid cam, all street..
Replies: 47
Views: 1568

Re: 1978 454 solid cam, all street..

The best you are going to do with a off the shelf street solid is use the mildest comp XE solid cam.
#11-674-4
Must replace the valve springs.
Degree it in slightly more advanced say on a 104 in c/l.
by F-BIRD'88
Mon Jan 06, 2020 6:51 pm
Forum: Engine Tech
Topic: Camshaft questions for 434 with small heads
Replies: 23
Views: 1107

Re: Camshaft questions for 434 with small heads

Howards cam #110183-08S Use the Rpm intake.. I would not use a 104lsa cam on this street motor with intent to run on mild gasoline nore with the dual plane... It will make a ton of torque with the off the shelf cam. This is the small base circle version. This is not the cam that makes the most horse...
by F-BIRD'88
Wed Dec 18, 2019 12:36 pm
Forum: Engine Tech
Topic: SBC 283 forged pistons
Replies: 45
Views: 1608

Re: SBC 283 forged pistons

A low low compression ratio is very desirable . What cylinder heads are planned or are available? For a budget build and low cr on a 283 a pre 1975 thick casting Open chamber 76 cc oem head will work very well with generous porting and 1.94-1.60 or 2.02-1.60 valves. eg336/920/441/487 castings. There...
by F-BIRD'88
Wed Dec 18, 2019 11:29 am
Forum: Engine Tech
Topic: SBC 283 forged pistons
Replies: 45
Views: 1608

Re: SBC 283 forged pistons

I understand your position as a seller-builder.
by F-BIRD'88
Wed Dec 18, 2019 12:32 am
Forum: Engine Tech
Topic: SBC 283 forged pistons
Replies: 45
Views: 1608

Re: SBC 283 forged pistons

Have a look at and consider the Edelbrock/Magneson
Eaton Mp122HH blower kit. Ut is a bit more money but a better more efficient supercharger.
by F-BIRD'88
Tue Dec 17, 2019 11:37 pm
Forum: Engine Tech
Topic: SBC 283 forged pistons
Replies: 45
Views: 1608

Re: SBC 283 forged pistons

Which supercharger does the end User have his heart set on for this?
by F-BIRD'88
Tue Dec 17, 2019 10:59 pm
Forum: Engine Tech
Topic: SBC 283 forged pistons
Replies: 45
Views: 1608

Re: SBC 283 forged pistons

If you can't tune you will bust pistons reguardless. If you tune for the fuel used and build it with a low cr (8.5:1 cr OR LESS) the (any type) pistons are not stressed by (reasonable) boost. (Because there is no detonation nore excess heat. Ya you have to follow the ring gap guidlines. Not that har...
by F-BIRD'88
Tue Dec 17, 2019 12:28 am
Forum: Engine Tech
Topic: SBC 283 forged pistons
Replies: 45
Views: 1608

Re: SBC 283 forged pistons

You won't find any low cr flat top or dished pistons for a 302.
by F-BIRD'88
Thu Dec 12, 2019 8:56 am
Forum: Engine Tech
Topic: SBC 283 forged pistons
Replies: 45
Views: 1608

Re: SBC 283 forged pistons

If it is low boost 10 psi or under and a low cr engine (8.5 or less, then a KB Hyper flat top 283 piston is plenty strong. Adjust top ring gap as per kb notes. Spend the money you save on correct setup Carbs/ timing .... KB165 Use a 76cc head on it for a 7.50:1 cr. Allows lots of boost without deton...
by F-BIRD'88
Mon Dec 09, 2019 9:03 pm
Forum: Engine Tech
Topic: Bending Rods and Walking Caps
Replies: 25
Views: 962

Re: Bending Rods and Walking Caps

Yup, its your launch method that is spiking the connecting rods. The purge method does not help either.
Never hit the nitrous at part throttle. Ever.
by F-BIRD'88
Mon Dec 09, 2019 1:58 pm
Forum: Engine Tech
Topic: Quadrajet vs. 4412
Replies: 25
Views: 2223

Re: Quadrajet vs. 4412

A qjet flows twice the air at the same pressure drop as a holley 500 2bbl does. (750 vs 353 cfm @1.5") If cast 4bbl intake rule use the gm (mercruiser) marine hirise cast 4 bbl intake. Looks a lot like a holley dominator /gm Z28 hirise but is cast and has a qjet flange. It is a powerfull hi rise dua...
by F-BIRD'88
Sun Dec 08, 2019 2:27 pm
Forum: Engine Tech
Topic: Dissimilar carb CFM comparison discussion
Replies: 11
Views: 538

Re: Dissimilar carb CFM comparison discussion

Find ,borrow a set of Edelbrock carbs to dyno test compare against the 450's. can be 2x750's.

Then try each on the street.
by F-BIRD'88
Sat Dec 07, 2019 2:28 am
Forum: Engine Tech
Topic: Street hyd cam combo
Replies: 9
Views: 630

Re: Street hyd cam combo

Use Comp cams cs265DEH-10 cam.

265-269 211-221 .442"-.465" (1.5) 110 lsa 106/114

Use a dual plane intake.
by F-BIRD'88
Wed Dec 04, 2019 2:33 pm
Forum: Engine Tech
Topic: Valve Spring Choice for Solid Roller Street/Strip
Replies: 40
Views: 1456

Re: Valve Spring Choice for Solid Roller Street/Strip

Id be analysing the lash ramps and the accel opening flank and decel closing flank in the areas between lash point and .020" lifter rise. Some 'hi torque design cam lobes don't even have a real opening lash ramp and the closing side is fast fast. (vs a "hi rpm cam lobe design) These can be quite asy...