Highest Total timing on your hot rod Cleveland.

[mikeyhunts]

I’m curious as to what others have seen their hot rod 4v closed chambered stroker Cleveland’s total timing tolerate.

Mine is a 381stroker with 10.3/1 compression with Holley hyperspark dizzy and Super Sniper.

Forged pistons, hbeam rods, forged crank.

Hyd roller .235/245@50, .625 ish lift.

It is in the 500ish HP ballpark, and I’ve been inching my way up on total timing.

Started at 32. Now at 35 on 93 pump gas.

I see reports up to 38.

Your thoughts appreciated.

I posted here since I know there are a lot of Cleveland’s here.

Thanks,

Mike

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[c9zx]

38 total (no vacuum advance). 408C cc 4V iron heads, 9.7:1 SCR, aggressive SFT cam. Chuck

 

[mikeyhunts]

That’s the number I keep hearing.

Have you Dynoed you combo?

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[c9zx]

That’s the number I keep hearing.

Have you Dynoed you combo?

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Yes I did. 529 HP/496 TQ. the dyno sheet is on this site if you can find it. Chuck

 

[mikeyhunts]

What intake are you using?

How big of a cam?

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[c9zx]

Blue thunder intake with minor radiusing on the plenum to runner turns. Cam is Lunati 41199LUN on a 110 LSA, .562/.580, 238/248 @ .050. If i were building it now I'd use a 10.25:1 SCR and a true custom cam from Mike Jones. Was too conservative on SCR because only 91 octane available here, next time.  Chuck

 

[jorgem2]

Same here 38 total no problems, been like that for years.

I had 18 at idle and 20 mechanical advance for years.

Last year tried a locked distributor at 38 degrees and seems to run better at idle and low speeds.

Cam is 255 duration .605 lift solid flat tappet and approx 10.5 or more compression

 

[mikeyhunts]

Good to know. You are real close to what I’m running.

I’m still at 36, and it’s running strong.

Good to know I have about 2 more degrees to play with.

Thanks everyone for the feedback.

Mike

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[red351]

351C 4V closed camber with a toploader

34 total with 18 to start lunati hyd. flat tappet 560/580 lift something (I forget the rest of the specs.)

Blue Thunder with 650 Holley double pumper.

Sanderson shorties with 2 1/2 pipes with the X and 2010 modified to fit mustang GT mufflers.

0 deck the block, 30 over flat tops, no stroker crank

Had a bit of knock with 4v cast exh. logs before I switch to shorties

dyno a little over 380 hp at 6200 rpm with max tq. at 5200 too the ground (if I remember correct I'm on winter vacation away from the snow).