427 SBF

I'm at 3100 lbs without me (1983 gt hatchback with toploader), 408 Cleveland dynoed 583hp, probably around 600hp with oil pan and intake change. Only ran 11.7 with shitty launch but at 125.4 mph, which puts it in the range yer after.
It takes a lot of hp to make up for a poor 60'
Fix your 60’. 🤷🏻‍♂️
 
I'm at 3100 lbs without me (1983 gt hatchback with toploader), 408 Cleveland dynoed 583hp, probably around 600hp with oil pan and intake change. Only ran 11.7 with shitty launch but at 125.4 mph, which puts it in the range yer after.
It takes a lot of hp to make up for a poor 60'
I know a guy making 460 at the wheels and runs a 10.8 at 122. 1.5 60ft I think he's 3200lbs or so.
 
Even with a Hydraulic roller I don't think 1.5hp/ci is out of reach. Searching the internet for 427w combos is pretty promising.

There are days a wish I would have went 460 sbf though 🤣
 
I know a guy making 460 at the wheels and runs a 10.8 at 122. 1.5 60ft I think he's 3200lbs or so.
Wheel hp can be manipulated. Great tuning tool but no good for comparing engine hp
I was leaving at an idle to not break parts. What I'm saying is that you need a car set up to launch and cut a good 60' or a shit load of hp to make up for it if you want to run 10.5's with a "street" car
 
Wheel hp can be manipulated. Great tuning tool but no good for comparing engine hp
I was leaving at an idle to not break parts. What I'm saying is that you need a car set up to launch and cut a good 60' or a shit load of hp to make up for it if you want to run 10.5's with a "street" car

My ego will either

A) keep me away from the track so I don't have a number to chase

B) keep me adding race car parts until I hate driving it on the street

I've got a clutch tamer and decent suspension parts. I expect the Detroit locker to explode long before I get that car into the 10s
 
My ego will either

A) keep me away from the track so I don't have a number to chase

B) keep me adding race car parts until I hate driving it on the street

I've got a clutch tamer and decent suspension parts. I expect the Detroit locker to explode long before I get that car into the 10s
Traction will break good parts.
Traction with a manual will break great parts 😆
No need for a clutch tamer when you don't use the clutch 😉
 
I watched a fun Engine Masters on TV today.

410 Windsor
9.7ish CR
AFR 195
Performer RPM
750 Holley
238 intake cam with two exhaust lobes

It's called something like "Single pattern, split pattern cam"

I think it's season 7, episode 17.
 
I watched a fun Engine Masters on TV today.

410 Windsor
9.7ish CR
AFR 195
Performer RPM
750 Holley
238 intake cam with two exhaust lobes

It's called something like "Single pattern, split pattern cam"

I think it's season 7, episode 17.

Can't seem to watch it for free. They have the other episode where they test different split patterns and I can watch that one
 
I watched a fun Engine Masters on TV today.

410 Windsor
9.7ish CR
AFR 195
Performer RPM
750 Holley
238 intake cam with two exhaust lobes

It's called something like "Single pattern, split pattern cam"

I think it's season 7, episode 17.
I discovered that show about a month ago. My SIL has MAX and I steal her account and sign on and watch that show. Lot's of good info on there.

My wife said my friend Danny, Al, and I could do that show. We have done this same type of thing for years. But all our testing is on the track and at the chassis dyno. No engine dyno for us broke-asses! :)

I wish Holley would have sent someone to the show on some of the episodes. While I like David, he got a lot of stuff wrong with the EFI. Too bad Burle or whatever his name is, he should have asked his EFI guys on the episode when they stopped testing when they got to the psi limit of the PAM sensor they were using. They could have easily kept at it, I would have shown them how.

Many years ago one of the magazines did an EFI vs. carb comparison. It featured a high-end 18* SBC my friend had built. I was there to do the EFI tuning. Was done at Dean Nickersons. He made two custom Dominators for the test. He beat me by a SOLID 10hp throughout the pull. I joked with Dean in the dyno room and look up in the air hood for his "hidden" nitrous nozzle! Dean had a good sense of humor. :)

Crazy thing is this: The EFI was quicker & faster at the track! My buddy did back to back testing, he was baffled. He went through a lot of torque convertors to get the carbs to run like the EFI. He finally did it though. This was ANCIENT EFI, but it's what we had, I made it work.
 
Can't seem to watch it for free. They have the other episode where they test different split patterns and I can watch that one
I was watching it on MAX through someone else's account.
I think there are a lot of episodes on Prime also, that is where I first found it, but they don't have the entire series.
 
Can't seem to watch it for free. They have the other episode where they test different split patterns and I can watch that one

In this episode they referred to that episode.
A guy at Schneider Cams said they changed multiple things at once in the older episode.
He gave them two cams with the same intake lobe and overlap so they would change only one thing.
The exhaust lobes were 238 (same as intake) and I think 244.
The larger exhaust was better throughout the curve.

It's actually mostly interesting because it's similar to your motor.

I'm going to stick with split cams, especially with my undersized exhaust system.
Although I was surfing speed-talk a few weeks ago and Mike Jones said you don't crutch a poor exhaust system with more exhaust duration.
You do it with more lift and a wider LSA.
The LSA part I do, but the lift part shocks the hell out of me.
 
A competent circleburner friend was discussing rod lengths and made the comment that Engine Masters is more comparable to American Chopper than real engine building. this was in reply to the episode that showed no difference when the rod length was changed. So take the cam results with a healthy skepticism also.
 
A competent circleburner friend was discussing rod lengths and made the comment that Engine Masters is more comparable to American Chopper than real engine building. this was in reply to the episode that showed no difference when the rod length was changed. So take the cam results with a healthy skepticism also.
They aren't perfect, but I feel they do a pretty good job. As the saying goes, we don't race dyno's. Most of their stuff is aimed at street cars and drag racing.
 
A competent circleburner friend was discussing rod lengths and made the comment that Engine Masters is more comparable to American Chopper than real engine building. this was in reply to the episode that showed no difference when the rod length was changed. So take the cam results with a healthy skepticism also.

Reher-Morrison came to the same result...
 
Reher-Morrison came to the same result...
That's interesting. More than one combo? The circle guys have documented clearly faster lap time with long rods in small block chevys. Hmm, different engines and different means of measure...
 
A competent circleburner friend was discussing rod lengths and made the comment that Engine Masters is more comparable to American Chopper than real engine building. this was in reply to the episode that showed no difference when the rod length was changed. So take the cam results with a healthy skepticism also.
They at least make me feel like they are unbiased and actually seeking answers vs pushing a product or service.

Some of these guys making YouTube videos have a shop and just throw shit out there to get attention it seems. A camshaft challenge for example...
 
That's interesting. More than one combo? The circle guys have documented clearly faster lap time with long rods in small block chevys. Hmm, different engines and different means of measure...

I don't remember the details, I do remember Vizard claimed it doesn't apply to anything most of us deal with since they were working with Pro Stock engines.

I thought the short track guys like short rods and the long track guys like long rods (which is kind of amusing).
The thinking being the short rod motors pull better out of corners while the long rods help peak HP?

The first time I ever heard of this stuff was in a Smokey Yunick book and I think he said "Use the longest rod that will fit".
 
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