Attn: Cam Spec Wizards

[Triple5even813]

Theoretical question here. What would a max effort/minimal chop camshaft for a >400" motor w/ a 2650 blower look like?

What would the best cam specs to get a bunch of air into this big engine and blower combo and maximize performance, without the obvious and extreme chop of a max effort cam?

I've been driving the car with a moderately choppy cam for 5 years now. It's cool and gets lots of attention, especially through the custom fabbed 3" free flowing exhaust, but the idea of having a >1000whp car with a stock-ish sounding cam seems more appealing to me now.

Car is an M6, by the way. Thanks!

[silversleeper]

I think because you want >1000rwhp the answer looks more like a turbocharger than a camshaft if not much chop is part of the requirement.

[Triple5even813]

Originally Posted by silversleeper

I think because you want >1000rwhp the answer looks more like a turbocharger than a camshaft if not much chop is part of the requirement.

Turbos would be great, especially if one wants to go really fast, but I just don't want to deal with turbo problems like burnt plug wires, high engine bay temps, constant oil changes, scavenger pumps, welding on the oil pan/timing cover, less room around the engine to work, etc... A 2650 blower will make 1000hp and then some. I'm pretty committed to the blower idea with the way the rest of my car is set up.

I wouldn't say minimal chop is a "requirement" per se, but it's an idea I'm kicking around and I know there's a ton of knowledge here on this forum...

[FasNuf]

I just want to know how in the hell you made 825 rwhp on the mods in your signature!

[Triple5even813]

Originally Posted by FasNuf

I just want to know how in the hell you made 825 rwhp on the mods in your signature!

I chalk it up to good cam selection, good airflow in and out of the engine, cold IATs and lots of flow, E85 octane, and a smart tuner.

One day if I can figure out how, I'll post track and dyno vids.

[Full_Spectrum]

Originally Posted by FasNuf

I just want to know how in the hell you made 825 rwhp on the mods in your signature!

Some dynos read higher than others. I suspect this one reads quite high.

That same combination on most dynojets would be in the 700 wheel range on E85.
A smart tuner isnt making a 125hp difference.

[Triple5even813]

Originally Posted by Full_Spectrum

Some dynos read higher than others. I suspect this one reads quite high.

That same combination on most dynojets would be in the 700 wheel range on E85.
A smart tuner isnt making a 125hp difference.

Some points to consider:

• This is in south Florida, close to sea level. Cars go faster and make more power down here
• February '21, it made 775 and 782 with hot IATs and no ice. Then we added ice to the tank, made the 825 pull, took 2 degrees of spark out, made 820 and called it a day. This is on the Mainline hub dyno that Cleetus McFarland was using for a while, and the guy who tunes his cars running the computer that day.
• February '19, with 3-4# less boost, no ice tank, stock exhaust, it made 749whp on a different dyno, which was a dynojet
• The car traps mid 130s in the 1/4, and runs low-mid 6s 60-130s

If there's a car out there making 700whp on E85, I'd call it an absolute dud. Don't judge mine based on your results. You sound like someone who spent a boatload of money to still be slow, and now you're coping. If that gets you in your feelings, remember that you're the one who came to my thread and starting @#$%ing on my car instead of contributing to the discussion. With all due respect...

You are also welcome to come down to FL, line up and get gapped lol

[JB'sZL1]

Yeah...I'd like that dyno read as well. I'm heavily cammed, headers, corn, ported, etc. and still don't make 825rwhp in cold weather. I'm close, and probably need 15's instead of 17's.

[Triple5even813]

https://drive.google.com/file/d/1omJ...ew?usp=sharing

I wish everybody would stop getting their panties in a twist about this, but here's a video.

[Full_Spectrum]

Originally Posted by Triple5even813

Some points to consider:

• This is in south Florida, close to sea level. Cars go faster and make more power down here
• February '21, it made 775 and 782 with hot IATs and no ice. Then we added ice to the tank, made the 825 pull, took 2 degrees of spark out, made 820 and called it a day. This is on the Mainline hub dyno that Cleetus McFarland was using for a while, and the guy who tunes his cars running the computer that day.
• February '19, with 3-4# less boost, no ice tank, stock exhaust, it made 749whp on a different dyno, which was a dynojet
• The car traps mid 130s in the 1/4, and runs low-mid 6s 60-130s

If there's a car out there making 700whp on E85, I'd call it an absolute dud. Don't judge mine based on your results. You sound like someone who spent a boatload of money to still be slow, and now you're coping. If that gets you in your feelings, remember that you're the one who came to my thread and starting @#$%ing on my car instead of contributing to the discussion. With all due respect...

You are also welcome to come down to FL, line up and get gapped lol

749rwhp with a stock exhaust, stock blower, stock heads, ported TB. Seems legit.
Im sure you have a nice car that runs great. Congrats.

[Triple5even813]

Originally Posted by Full_Spectrum

749rwhp with a stock exhaust, stock blower, stock heads, ported TB. Seems legit.
Im sure you have a nice car that runs great. Congrats.

It runs great, thanks. Stock throttle body as well. It did have headers for the 749hp pull. Pulley setup was 8.6/2.5. Upgraded pulleys to 9.5/2.4 (roughly 4# more boost) and added ice tank, 1" lines to and from the blower, and 3" free flowing exhaust w/ no mufflers for the most recent 825hp dyno pull.

[JB'sZL1]

Just out of curiosity, how long (miles and years) have you been running it like this? I ask because with that combo, you're spinning at 26K. My tuner wouldn't do that.

[Triple5even813]

Originally Posted by JB'sZL1

Just out of curiosity, how long (miles and years) have you been running it like this? I ask because with that combo, you're spinning at 26K. My tuner wouldn't do that.

About 1.5 years and 5k miles on current setup. 10-15 1/4 mile passes. By my math, it's about 27,7k at 7k RPM. Blower sounds healthy and feels tight when you take the belt off. No radial or axial play, no gritty feel. Gear oil looks clean and clear. F it, send it!

Ran the previous pulley combo for about 3 years and 35k miles. The car was a daily driver the first 1.5 years I owned it.

[JB'sZL1]

And which tires and wheels please? They look like 17's.