Engine upgrade

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May 2, 2022 | 04:31 PM

#21

scottyp99

Le Mans Master

Joined: Mar 2008

Posts: 5,948

Likes: 72

From: Oxford MA-----You just lost the game!!!!

Quote:

Originally Posted by Pale Roader

Absolutely ditch that 2 1/4" exhaust when you get headers. 2.5" mandrel-bent minimum. Get GOOD mufflers (not just popular ones), and a properly designed/made/located X-pipe to top it off.

Don't be fooled by the fact that a 2 1/4" pipe is only 1/4" smaller than a 2 1/2" pipe. It doesn't sound like it would make much difference, but if you do the math, a 2 1/4" diameter pipe has a cross sectional area of 3.97 square inches, while a 2 1/2" diameter pipe has a cross sectional area of 4.90 square inches. That's significant.

Scotty

May 2, 2022 | 05:17 PM

#22

REELAV8R

Le Mans Master

Joined: Apr 2011

Posts: 6,284

Likes: 1,172

From: Hermosa

Quote:

Originally Posted by Steve Kistler

Since time is a luxury I have for the time being, I will do my due diligence and start researching. Thanks

This is from a thread in which a flat tappet cam break in went wrong. Another poster had this one go right with the mentioned lifters if this helps you decide which lifters to get.

Quote:

For what it’s worth, I just built a 350 with hyd flat tappet for a guy this week. I used Howard’s direct lube lifters. They have a small flat milled in the side of the lifter body that lets oil bleed off out of the oil galley down onto the cam. Breakin went smoothly. Looks like a good idea. If I were doing a big block I think I would go with nitrided cam also.

May 7, 2022 | 03:27 PM

#23

Taijutsu

Drifting

Joined: Apr 2002

Posts: 1,752

Likes: 37

From: Stockton Ca

Similar Engine Builds.

Steve. I have a 350 w/same 270 HR cam, 1.6 RRs, w/TFS heads Air Gap and a 650 Holly.
It originally put 280 RWHP @5200 and 315 RWTQ @4100.
I wanted a SB that pulls like a BB,
This engine is happy at 2200 rpm and starts getting busy at 3K. 70 mph
I rarely have to go more that 4K

I recently put in new 2.5" ex pypes and 2.5" Rams Horn ex man,
It now puts down 303 RWHP and 330 RWTQ.
Time for a 5 sp!

May 7, 2022 | 04:40 PM

#24

augiedoggy

Le Mans Master

Joined: May 2007

Posts: 5,047

Likes: 1,125

From: North tonawanda NY

Quote:

Originally Posted by Taijutsu

curious, which pistons? flat tops or dished?

May 8, 2022 | 12:13 AM

#25

Taijutsu

Drifting

Joined: Apr 2002

Posts: 1,752

Likes: 37

From: Stockton Ca

Forged Everything

I used flat tops w/2 valve reliefs.
I wanted to keep the comp up.

May 8, 2022 | 04:05 PM

#26

Steve Kistler

Thread Starter

Racer

Joined: Aug 2019

Posts: 253

Likes: 24

From: Oklahoma

Back to subject at hand. Here is what I now have an L-82 bored to 360 ci engine with 4 relief flat tops a stage 3 cam ,flowtech full length headers,estreet 5073 heads the original Oem intake and qjet. I went with a 2700-3000 assault stall converter. It starts right up and idles okay. It goes to the exhaust shop next week for the 2 1/2” true duals. My question is how will I know when I have all there is (power) with this setup. 3” element and the hood closes.

May 8, 2022 | 04:17 PM

#27

Taijutsu

Drifting

Joined: Apr 2002

Posts: 1,752

Likes: 37

From: Stockton Ca

Ask the dyno operator.
He does this for a living.
He is not emotionally involved!

May 8, 2022 | 05:48 PM

#28

Steve Kistler

Thread Starter

Racer

Joined: Aug 2019

Posts: 253

Likes: 24

From: Oklahoma

Quote:

Originally Posted by Taijutsu

Ask the dyno operator.
He does this for a living.
He is not emotionally involved!

agree with your thoughts. I was thinking more along the lines if anyone might know if a different intake or carb combo is going to enhance performance just based on components used. Not really concerned about numbers just how big of a smile it brings me