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Search: Posts Made By: NHGuy
Showing results 1 to 25 of 410
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Forum: General Q & A
01-14-2022, 10:53 PM
Replies: 10
Views: 354
Posted By NHGuy

I have a 10:1 383 that's pretty dialed now. I...

I have a 10:1 383 that's pretty dialed now. I think you will add 7 to 8 mph.
Forum: Formula
01-14-2022, 10:43 PM
Replies: 52
Views: 2,047
Posted By NHGuy

I have the next size down, an 87 223LS. Has...

I have the next size down, an 87 223LS. Has mildly upgraded 383, not crazy, just something I can turn the key with 93 octane. I have not GPS'd it but I can get a 19 pitch Mirage to run 5200 rpm...
09-19-2021, 07:29 AM
Replies: 2
Views: 425
Posted By NHGuy

SBC Atermarket Ignition wire routing

My wires are too long for my setup and I am getting ready to make a fitted set.
I want to do a nice neat job that stays in place and does not look all loose and floppy like I currently have.
Who...
09-19-2021, 07:15 AM
Replies: 11
Views: 730
Posted By NHGuy

You'll do best with a dual plane intake. Mine has...

You'll do best with a dual plane intake. Mine has a dual plane air gap. Which allows a cooler fuel charge since the carburetor mount point is not in contact with the engine. When you look at these...
08-28-2021, 08:39 PM
Replies: 12
Views: 1,128
Posted By NHGuy

No DVR, you missed something. It was lean at...

No DVR, you missed something. It was lean at upper mid RPM, not wide open.
I took a lakeside cabin last week and brought some tools.
Ended up with 8.5 power valve, 71 idle bleeds from oe 70's, 76...
08-16-2021, 09:17 PM
Replies: 5
Views: 352
Posted By NHGuy

removed

removed
08-16-2021, 09:16 PM
Replies: 5
Views: 352
Posted By NHGuy

gaad, I cannot manage this post!

gaad, I cannot manage this post!
08-16-2021, 09:07 PM
Replies: 5
Views: 352
Posted By NHGuy

removed

removed
08-16-2021, 08:22 PM
Replies: 12
Views: 1,128
Posted By NHGuy

Hmm. I have a marine Quickfuel 750 and it's 12.5...

Hmm. I have a marine Quickfuel 750 and it's 12.5 to 13 AFR every where except the top of my primary rpms. Where it goes to 13.4 from 3200 to 3400 rpm.
4000 pound boat with a 10.3:1 forged piston 383...
Forum: General Q & A
08-03-2021, 06:14 AM
Replies: 17
Views: 1,904
Posted By NHGuy

Thanks for reporting your resolution. Too many...

Thanks for reporting your resolution. Too many folks never come back with the answer.
Forum: General Q & A
08-03-2021, 06:11 AM
Replies: 3
Views: 269
Posted By NHGuy

Did you install the pump yourself? Did this...

Did you install the pump yourself? Did this engine have a mech pump previously?
There should have been some pump arm spring pressure to overcome when bolting the pump to the engine. If not check...
08-01-2021, 06:47 PM
Replies: 12
Views: 1,128
Posted By NHGuy

Reversion would surprise me on a stock build, but...

Reversion would surprise me on a stock build, but folks who know these engines will tell you. You can inspect spark plugs or exhaust mani's for wetness too.
08-01-2021, 08:30 AM
Replies: 12
Views: 1,128
Posted By NHGuy

Xlint89, I found that a 32d to 16th extra turn...

Xlint89, I found that a 32d to 16th extra turn out on the 4 idle mix screws corrected a stumble going in to gear (once engine is warm). Just a touch of idle fuel on mine. But my idle screws are not...
Forum: General Q & A
08-01-2021, 07:54 AM
Replies: 17
Views: 1,904
Posted By NHGuy

Yeah, it won't start with that low a voltage. get...

Yeah, it won't start with that low a voltage. get the battery up to full before proceeding.
08-01-2021, 07:48 AM
Replies: 1
Views: 436
Posted By NHGuy

Nevermind, got it from documentation I had, etc

Nevermind, got it from documentation I had, etc
07-31-2021, 09:39 AM
Replies: 1
Views: 436
Posted By NHGuy

Gimbal bearing change

I'm going to do a gimbal bearing on an Alpha 1. Don't know yet whether it's a Gen 2. And I have a jaw puller like Mercruiser suggests, so no likely issue on removal.
Or, can I just pivot the old...
Forum: Swap Shop
07-29-2021, 08:05 AM
07-28-2021, 10:57 AM
Replies: 2
Views: 306
Posted By NHGuy

It would be a 1.5. And .03 of a revolution...

It would be a 1.5. And .03 of a revolution doesn't amount to anything.
07-27-2021, 09:32 AM
Replies: 21
Views: 1,350
Posted By NHGuy

edited my post from 7/26

edited my post from 7/26
07-27-2021, 06:16 AM
Replies: 12
Views: 1,128
Posted By NHGuy

Rich idle, Quickfuel has no Powervalve Blowout Protection

I have been working on dialing in my Quickfuel M-750. Particularly the midrange AFR at the top of my primary rpm just before my secondaries open.

Those of you who speak carburetor will know that...
Forum: General Q & A
07-26-2021, 10:32 PM
Replies: 10
Views: 844
Posted By NHGuy

So find the Edelbrock manual and start setting it...

So find the Edelbrock manual and start setting it for the 502.
07-26-2021, 11:16 AM
Replies: 21
Views: 1,350
Posted By NHGuy

Edit: OP said he's got rich looking plugs. He...

Edit: OP said he's got rich looking plugs. He didn't say at idle.

Don't add in the variable of power valve unless you take out even more from primary, and perhaps secondary too.
Power valves add...
Forum: Prop Talk
07-26-2021, 11:08 AM
Replies: 5
Views: 373
Posted By NHGuy

I misspoke, With Edelbrocks you would use a...

I misspoke, With Edelbrocks you would use a stiffer spring to bring in the enrichment sooner
Forum: Prop Talk
07-26-2021, 06:36 AM
Replies: 5
Views: 373
Posted By NHGuy

No mid range...are you going by AFR or seat of...

No mid range...are you going by AFR or seat of pants dynamometer? My Quickfuel 750 has a hole in the fuel supply at 3700 RPM. I'm working on it now. I just went up to a 6.5 power valve from a 5.0. If...
Forum: General Q & A
07-23-2021, 06:04 AM
Replies: 1
Views: 246
Posted By NHGuy

I hope you have wideband AFR. It makes all this...

I hope you have wideband AFR. It makes all this way easier.

You need widebands, jet kits, some reusable fuel bowl gaskets, and a vacuum gauge.
Air bleeds and squirters are later.


But, put...
Showing results 1 to 25 of 410
 


 
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