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by KnightEngines
Wed Dec 07, 2022 3:23 am
Forum: Engine Tech
Topic: 408 SBC OIl Pressure Drops Under Heavy Acceleration
Replies: 9
Views: 287

Re: 408 SBC OIl Pressure Drops Under Heavy Acceleration

Try a thinner oil to start with, say 10/30.
If it improves it's a drainback issue.

Without pulling the engine down to open up the drainbacks you could try restricted pushrods - less oil up top is less to drain back.
by KnightEngines
Tue Dec 06, 2022 6:50 am
Forum: Engine Tech
Topic: Burn patterns on piston and chamber
Replies: 72
Views: 1941

Re: Burn patterns on piston and chamber

Super Stock engine off the dyno. Chad, Are you using leaded fuel?? NHRA has a list of fuels. Tried them all. It made the same power with VPc12 and I like the smell. Brings back memories! :) Chad - dunno if you've tried it, but give VP C85 a shot, I've never seen that stuff not pick up power. It's e...
by KnightEngines
Thu Dec 01, 2022 1:33 am
Forum: Engine Tech
Topic: Intake Manifold Porting Show ‘n Tell
Replies: 209
Views: 5457

Re: Intake Manifold Porting Show ‘n Tell

Holden TP pro paw modified to 4500 pattern & plenum extended to shorten end runners, all mods were done in weld, including building up around the carb pad to make it big enough to mount a 4500. 20200212_100312.jpg 20200212_100448.jpg 20200212_100329.jpg 20200212_100321.jpg 20200212_100514.jpg 202002...
by KnightEngines
Thu Dec 01, 2022 1:27 am
Forum: Engine Tech
Topic: Intake Manifold Porting Show ‘n Tell
Replies: 209
Views: 5457

Re: Intake Manifold Porting Show ‘n Tell

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by KnightEngines
Thu Dec 01, 2022 1:26 am
Forum: Engine Tech
Topic: Intake Manifold Porting Show ‘n Tell
Replies: 209
Views: 5457

Re: Intake Manifold Porting Show ‘n Tell

I did this coz I'm stupid & couldn't buy the required manifold. 440 Chrysler victor intake chopped up & welded back together to fit an AMC 401: 20220328_152427.jpg 20220506_102035.jpg 20220506_114507.jpg 20220506_121742.jpg 20220513_140040.jpg 20220513_144057.jpg 20220513_145021.jpg 20220513_154742....
by KnightEngines
Thu Nov 24, 2022 1:02 am
Forum: Engine Tech
Topic: What ll this make? Rammed 496 bbc
Replies: 12
Views: 449

Re: What ll this make? Rammed 496 bbc

bob460 wrote: Thu Nov 24, 2022 12:36 am My guess 750-770hp at 7,000 rpm...... :wink:
Shit I hope we don't have to turn it that hard!

I'll set my sights on 750hp, anything extra is a bonus!
by KnightEngines
Wed Nov 23, 2022 11:32 pm
Forum: Engine Tech
Topic: What ll this make? Rammed 496 bbc
Replies: 12
Views: 449

Re: What ll this make? Rammed 496 bbc

100mph in that boat is way respectable. The bigger heads and intake will definitely help with more mph. Keep the old gears around, you might find it will respond better to a half inch or so bigger OD and a pitch change, think of it as a bigger tire with same gearing. As you know, marine is a whole ...
by KnightEngines
Wed Nov 23, 2022 10:02 pm
Forum: Engine Tech
Topic: What ll this make? Rammed 496 bbc
Replies: 12
Views: 449

Re: What ll this make? Rammed 496 bbc

Most people with that combo will make 740ish but I bet with your "rub" work on the heads and intake you should be in the 800 ballpark, might take 6800rpm though. Is this a jet or an I/O? 17.5' flat bottom shallow V ex circuit race boat. The old 489 it's based on made 680hp @ 6300 with edelbrock E-s...
by KnightEngines
Wed Nov 23, 2022 7:50 pm
Forum: Engine Tech
Topic: What ll this make? Rammed 496 bbc
Replies: 12
Views: 449

What ll this make? Rammed 496 bbc

Not having built a lot of BBC's I only have a rough idea what this thing will make. Should have it on the dyno in January. Stock 2 bolt block with 4 bolt steel centre caps & short grout fill. Scat 4.25" steel crank Scat H beam 6.385" rods Racetech 21cc dome tops with metric ring pack DRP (China, but...
by KnightEngines
Tue Nov 22, 2022 11:20 pm
Forum: Engine Tech
Topic: 350ci 470HP Peak at 6000RPM
Replies: 86
Views: 2822

Re: 350ci 470HP Peak at 6000RPM

Lot of dyno minsters loosing their hair on this. My point stands.. Your 12:1 cr examples are not valid and they all want to rev much higher too. You All by you own evidence proved my point on a hot 350 sbc. 470-500 hp zone power curve. No, we didn't, we proved you have NFI. None of the sheets I pos...
by KnightEngines
Tue Nov 22, 2022 5:37 pm
Forum: Engine Tech
Topic: 350ci 470HP Peak at 6000RPM
Replies: 86
Views: 2822

Re: 350ci 470HP Peak at 6000RPM

Screenshot_20221123-085737_Gallery.jpg
Set the limiter at 6100.
Job done.

The only reason I can't show you one that peaks at 500hp & 6000rpm is because I rarely feel the need to cap anything at 6000, it'd be stupid.
by KnightEngines
Mon Nov 21, 2022 2:43 am
Forum: Engine Tech
Topic: 350ci 470HP Peak at 6000RPM
Replies: 86
Views: 2822

Re: 350ci 470HP Peak at 6000RPM

Plain Jane Vic jnr, team G or 300-25 will do it - with a bit of a rub.
300-25 needs the least rubbing.
by KnightEngines
Sun Nov 20, 2022 10:12 pm
Forum: Engine Tech
Topic: How will you go faster?
Replies: 293
Views: 7106

Re: How will you go faster?

Your missing the point.. You are not the first guy who tried to get a 350 sbc in a 3600 lbs Street trim Camaro into the 11's... You can make 470 hp from the 10.50:1 CR sbc. fir sure.. BUT NOT AT 6000 RPM.. It will not happen. This engine has been built to 470 hp + and minus over 1 million times... ...
by KnightEngines
Sun Nov 20, 2022 10:11 pm
Forum: Engine Tech
Topic: How will you go faster?
Replies: 293
Views: 7106

Re: How will you go faster?

Your missing the point.. You are not the first guy who tried to get a 350 sbc in a 3600 lbs Street trim Camaro into the 11's... You can make 470 hp from the 10.50:1 CR sbc. fir sure.. BUT NOT AT 6000 RPM.. It will not happen. This engine has been built to 470 hp + and minus over 1 million times... ...
by KnightEngines
Sun Nov 20, 2022 5:13 pm
Forum: Engine Tech
Topic: How will you go faster?
Replies: 293
Views: 7106

Re: How will you go faster?

Your missing the point.. You are not the first guy who tried to get a 350 sbc in a 3600 lbs Street trim Camaro into the 11's... You can make 470 hp from the 10.50:1 CR sbc. fir sure.. BUT NOT AT 6000 RPM.. It will not happen. This engine has been built to 470 hp + and minus over 1 million times... ...