496 to be DYNO'D!

[68Redhead]

Wow Mark, do you have payment plans?

Can't wait to see the numbers, I keep going back and forth between a 454 and 496 for my 'velle!
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[smoknbarrels]

Originally Posted by 69GMC910

Please make yer estimates for HP and TQ! Engine should hit the dyno this wknd or early next week.

496
10.2CR
AFR 265's
.578I
.608E
RPM Air Gap
850 Holley

Closest guess wins a virtual high five!

910

This at 700hp, (not saying it's not) but I must have really been low balled on my 496, at 630HP. my set-up:
Holley 850 DP 4150
10.7 CR
RPM Air Gap
Performer RPM oval heads
2 inch primaries headers
Roller rockrs/cam with a 304HR comp cams
looser bearings

Your AFR heads flow a bit better, would it make that much of a difference? eventhough I have more lift I still don't flow quite as good.

[Vortecpro]

Originally Posted by smoknbarrels

This at 700hp, (not saying it's not) but I must have really been low balled on my 496, at 630HP. my set-up:
Holley 850 DP 4150
10.7 CR
RPM Air Gap
Performer RPM oval heads
2 inch primaries headers
Roller rockrs/cam with a 304HR comp cams
looser bearings

Your AFR heads flow a bit better, would it make that much of a difference? eventhough I have more lift I still don't flow quite as good.

Theres alot more to consider than just air flow, the AFR 265 does demoralize the RPM heads, esspecially when your only lifting the valve .570. This engine will peak @ 6400 RPM when its all said and done, thats something else to consider, I have not had much luck with the comp hyd roller lobes, remember Ive been developing these exact same engines for 7 years now. I dont think you got hosed, I just know what goes into my engine, and its a little more than an average rebuild. At this point Jarred I think I will ask Harold Bettes to come down and supervise these final tests and write a report on this engine and how it was tested. So stay tuned and lets see what we end up with.

[Super73]

Mark,

I don't see more than one guy really calling you out on your numbers. With that, you need to have Harold Bettes come down and verif everything?

If you took my post as doubting your abilities, then you need to go back and read it again. I was forming my guess based on the info provided and the tools I had. Don't let my love for the LS based motors rain on your parade, there is still a market for big blocks, just not in my stuff.

You seem a little quick to get defensive, but hey, I can understand taking things personal at times.

[Vortecpro]

Originally Posted by Super73

Mark,

I don't see more than one guy really calling you out on your numbers. With that, you need to have Harold Bettes come down and verif everything?

If you took my post as doubting your abilities, then you need to go back and read it again. I was forming my guess based on the info provided and the tools I had. Don't let my love for the LS based motors rain on your parade, there is still a market for big blocks, just not in my stuff.

You seem a little quick to get defensive, but hey, I can understand taking things personal at times.

No, it not a problem, I get this all the time, I dont mind it, the thing with me is, I have customers at the track that do all my speaking for me, the proofs in the performance, and I got a lot more examples dont change, your good with me Harold comes down almost everyday anyway. 10.8 COMP 496 gm oval ports 9.56 @ 3615-3630 first full pass 32 dgrees timing, stay tuned.

[69GMC910]

That is one bada$$ velle!
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[shawnt]

Just an FYI.

On the.9.56 pass and the pass with the maroon camaro with the 468. I was there for both of those passes as we rented the track. None of this is bull****.
The 9.56 was off the trailer and the 3rd pass ever on the motor. He also pedal'd that pass because the wheelie went a little higher than he wanted.
Garrets 468 is a bad little mofo!
The red chevelle should go high 20's low 30's when ironed out.
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[hotrod 80]

Originally Posted by shawnt

Just an FYI.

On the.9.56 pass and the pass with the maroon camaro with the 468. I was there for both of those passes as we rented the track. None of this is bull****.
The 9.56 was off the trailer and the 3rd pass ever on the motor. He also pedal'd that pass because the wheelie went a little higher than he wanted.
Garrets 468 is a bad little mofo!
The red chevelle should go high 20's low 30's when ironed out.
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I was also at this test session and both of these cars , dispite chassis adjustment being off , made nice passes . Thinking the Camaro was on a 275 DR .

[mud.man.rj]

Wow, whole different truck in the old pictures, good job on it.

[shawnt]

Originally Posted by hotrod 80

I was also at this test session and both of these cars , dispite chassis adjustment being off , made nice passes . Thinking the Camaro was on a 275 DR .

You must've seen the truck in my sig tear the driveshaft up?
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[69GMC910]

Engine was dyno'd yesterday. I should have copies of the results tonight! The numbers are good.... Really good!
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[GMR-PERFORMANCE]

Congrats!!! I wanted to put mine up but had a few issues with the guys doing the work.. thus I will break the engine in and then have it put on a drum and I will have what really gets to the pavement.. I wish had a crank number as well though.. jealous HA HA

[Blue Rat]

I was hoping to see the numbers before I go to bed. Maybe I wake up an check around 1 or 2am.

[Super73]

Patiently waiting to see how far off performance trends was with my guess work. By the sound of it, quite a bit.
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[Blue Rat]

Originally Posted by Super73

Patiently waiting to see how far off performance trends was with my guess work. By the sound of it, quite a bit.
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Looks like I am going to bed again with out seeing the numbers. Oh well.

[69trk]

I say 733hp

[Vortecpro]

Originally Posted by Super73

Patiently waiting to see how far off performance trends was with my guess work. By the sound of it, quite a bit.
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Jerrods results. 496, 9.9 compression, 238@.050 hyd roller, AFR 265 heads, 850 holley.

[Vortecpro]

Originally Posted by Vortecpro

Jerrods results. 496, 9.9 compression, 238@.050 hyd roller, AFR 265 heads, 850 holley.

Sorry about the poor pictures.

[69GMC910]

Thank you Mark! I can't wait to yank out the small block and drop this monster in its place!
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[Super73]

Not too shabby at all...

[mud.man.rj]

Very nice, looks like a parts breaker for sure, fun all day.

[69GMC910]

Trying to build everything strong the first time! If I succeed, it will still be a neck snapper though!!! \m/ \m/
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[69GMC910]

It's a few months away, but the first track outing is slated for June 8/9th in Medicine Hat, Alberta!
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[GMR-PERFORMANCE]

I dyno here but it is a rear wheel dyno for harleys. I have a question on the AFR that is showing on the sheet. Is there a reason that its running so rich?? Or was that where they set it as it made the most power there, or ran cooler, Most will run in the 13.0 range to 13.5 and run cool to make the best power.. Not stirring the pot only asking. To me that seems too rich.

[Vortecpro]

Originally Posted by GMR-PERFORMANCE

I dyno here but it is a rear wheel dyno for harleys. I have a question on the AFR that is showing on the sheet. Is there a reason that its running so rich?? Or was that where they set it as it made the most power there, or ran cooler, Most will run in the 13.0 range to 13.5 and run cool to make the best power.. Not stirring the pot only asking. To me that seems too rich.

It was rich, ever here the saying "leavin a little in the bank"?