496 street/strip combos ? - Chevelle Tech
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post #1 of 44 (permalink) Old Jan 16th, 20, 1:14 PM Thread Starter
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496 street/strip combos ?

Hey guys , I have a 445 casting 454 sitting around the house and was thinking of having a local shop build me a 496 with a scat rotating assembly maybe some promaxx heads and some sort of roller cam .im also possibly considering the ATK 496 or the blueprint 509 for the same money factor because I always seem to have bad luck taking things to a machine shop .my car is an all steel 70 with a th400 and a 3.90 12 bolt . My goal is mid 11s with this car . What combos are you running in your cars of similarity to my car that work well for the times I’d like to run ? And what are your opinions of the crate companies I listed above if I decide to go that route? Thanks
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post #2 of 44 (permalink) Old Jan 16th, 20, 1:52 PM
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Re: 496 street/strip combos ?

If you are going with a crate engine go with Mark Jones aka vortecpro
https://vortecpro454.com/

Chevelle Malibu ss 64
489 BB with parts from Lewis racing
Alumitech radiator with dual spals
Th 400 Edge 9.5" converter
57 3/4 wide 12 bolt: Eaton posi, Us gear 3.31, Toms KA 33 splines axles
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post #3 of 44 (permalink) Old Jan 16th, 20, 2:03 PM
 
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Re: 496 street/strip combos ?

Search Blue66 and Brian Goodings pump gas 496..... 1966 Chevelle, 3600#, 9.80's

Chris Straub
Mfg Performance Parts

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Why is it we never have time or money to do it the right way in the beginning but we always have time and money to do it over again?
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post #4 of 44 (permalink) Old Jan 16th, 20, 2:08 PM
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Re: 496 street/strip combos ?

See my Sig for Track Times with only a 468 ci Engine TH400 3.70 Rear Gears Full Dress on Street Legal Tires

I drive my car in the city on the Hwy for 100 plus oneway trips all the time in nice weather

I vote for Mark at Vortecpro and one of his 467/468 Engines either the 570 HP or the 620 HP ones
https://vortecpro454.com/

If you want details PM me your Email and I will send you a Microsoft Doc with the parts used in my Engine done by a local guy


67 Chevelle Malibu SS Cdn
Born 283 / PG / A51
468/TH400 2,500 stall/ S60 3.70 Gs
Prev Best on M/T ET S/S #3454 street Tires/Dress 2018/05/20
60' = 1.664
1/8 = 7.532 et / 91 mph
1/4 = 11.814 et / 115 mph
NEW Best with 3,500+ Stall TC 2019/09/08
60' = 1.547
1/8 = 7.311 et / 91.76 mph
1/4 = 11.595 et / 114.28 mph


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post #5 of 44 (permalink) Old Jan 16th, 20, 7:04 PM
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This sounds pretty familiar. Check my build post. Gm block gm heads and a few good parts and you have it. Big money heads are great, but I don’t believe needed for what your doing. Also The above recommendations from other members are right on.
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post #6 of 44 (permalink) Old Jan 16th, 20, 10:15 PM
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Re: 496 street/strip combos ?

Quote:
Originally Posted by Kirk's67SS View Post
See my Sig for Track Times with only a 468 ci Engine TH400 3.70 Rear Gears Full Dress on Street Legal Tires

I drive my car in the city on the Hwy for 100 plus oneway trips all the time in nice weather

I vote for Mark at Vortecpro and one of his 467/468 Engines either the 570 HP or the 620 HP ones
https://vortecpro454.com/

If you want details PM me your Email and I will send you a Microsoft Doc with the parts used in my Engine done by a local guy

Or find it here:

https://www.chevelles.com/forums/13-...l#post11103868
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1981 Malibu wagon
406/350/4.10
Best ET NA 12.20 @ 110
Best ET w/N2O 11.47 @ 117
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post #7 of 44 (permalink) Old Jan 16th, 20, 11:49 PM
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Re: 496 street/strip combos ?

Since I took the time to open up an old, old computer...thought I would share my work tonight...

496
10:1
781 2.19/1.88 (flow from VTP 620 hp build)
Dual plane intake
750 cfm carb
Headers w/mufflers

Looks like the Comp Cams XE274H/280H or Lunati 60204 is a really sweet combination for mild gears and converter.

The 280H doesn't give up much and the cam is old school simple.
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1981 Malibu wagon
406/350/4.10
Best ET NA 12.20 @ 110
Best ET w/N2O 11.47 @ 117
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post #8 of 44 (permalink) Old Jan 17th, 20, 5:36 AM Thread Starter
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Re: 496 street/strip combos ?

Quote:
Originally Posted by dragginwagon406 View Post
Since I took the time to open up an old, old computer...thought I would share my work tonight...

496
10:1
781 2.19/1.88 (flow from VTP 620 hp build)
Dual plane intake
750 cfm carb
Headers w/mufflers

Looks like the Comp Cams XE274H/280H or Lunati 60204 is a really sweet combination for mild gears and converter.

The 280H doesn't give up much and the cam is old school simple.
Thanks for the info ! 781 and 049 castings seem to be great heads for a mild build Im looking to do . My only dilemma is the cost to grab a set of heads used since I dont already have them and then have a shop re do them , Id probably be into them for the cost of a set of aftermarket ??
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post #9 of 44 (permalink) Old Jan 17th, 20, 6:39 AM
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Re: 496 street/strip combos ?

Quote:
Originally Posted by 70ssclone View Post
Thanks for the info ! 781 and 049 castings seem to be great heads for a mild build Im looking to do . My only dilemma is the cost to grab a set of heads used since I dont already have them and then have a shop re do them , Id probably be into them for the cost of a set of aftermarket ??
Yes probably close in cost to a set of Edelbrock e-streets or Brodix race rites.
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Chevelle Malibu ss 64
489 BB with parts from Lewis racing
Alumitech radiator with dual spals
Th 400 Edge 9.5" converter
57 3/4 wide 12 bolt: Eaton posi, Us gear 3.31, Toms KA 33 splines axles
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post #10 of 44 (permalink) Old Jan 17th, 20, 7:18 AM
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Re: 496 street/strip combos ?

Quote:
Originally Posted by 70ssclone View Post
Thanks for the info ! 781 and 049 castings seem to be great heads for a mild build Im looking to do . My only dilemma is the cost to grab a set of heads used since I dont already have them and then have a shop re do them , Id probably be into them for the cost of a set of aftermarket ??
For heads, swap meets, Craigslist, or Facebook marketplace!

So many people upgrading to aluminum, which drives the price down for the factory heads. The heads on my 467 already had 2.19/1.88 and decent springs (set up for roller) - cost $200. A fresh valve job, replaced a couple worn valves, and new springs - I've got $565 in mine. Even if you had to replace guides/install liners and replace with all new valves wouldn't get you near a set of new BBC heads (pair).

My observations about a 10:1 496...using a flat tappet cam, 230 intake duration is the point of diminishing returns. The XE274H eats the larger cams in average power and torque 2000-6000 an 3500-5500 due to more optimal compression and lack of head flow. I base this statement on adding duration after this point doesn't increase peak rpm for hp or torque and peak hp and torque production drops off to boot.

Using a 230 @ 0.050" roller cam helps crutch the head flow (which seems to be lacking for the flat tappet cam even with 2.19/1.88 and port work) and compression.

1981 Malibu wagon
406/350/4.10
Best ET NA 12.20 @ 110
Best ET w/N2O 11.47 @ 117
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post #11 of 44 (permalink) Old Jan 17th, 20, 9:14 AM Thread Starter
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Thanks for all that great info .im also looking at a set of Procomp heads that are re done by skip white performance . They go through a set of bare castings and re work them with all good parts . I have searched high and low and cant find a single bad review from anyone on a set of their re-worked pro comps . Seems like a great head for the price point . I will send you the link to take a look for me if you care to.


https://www.skipwhiteperformance.com...val-274_92785/

Last edited by 70ssclone; Jan 17th, 20 at 9:18 AM. Reason: Mis spelling
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post #12 of 44 (permalink) Old Jan 17th, 20, 9:32 AM
 
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Re: 496 street/strip combos ?

Bolt on a set of AFR265's, mild cam and your all over 600HP if you choose. A little more cam, Vic Jr, and a 950 your all over 650HP.

If you find a set of castings your looking at:
$160 for valves
$260 for spring retainers locks
$ 80 for guides in the heads
$ 50 for rocker studs
Labor
$50 for cleaning
$250
$100 for installing guides
$150 for flat mill
$100 for assembly

$1200 for part and labor + cost of castings. Can you find a set at a swap meet or on FB market place cheaper....yes...tons out there....but what are getting? Every set of heads we have had come it that were fresh.....ready to go.....needed work. Just had a Dart Little M brought to us.....DEAL....$1600. Suppose to be Std bore....... 2 sleeves, 4 inserts in the deck, and bore is 4.165, deck is 8.990". Not such a deal now.
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Chris Straub
Mfg Performance Parts

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Why is it we never have time or money to do it the right way in the beginning but we always have time and money to do it over again?
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post #13 of 44 (permalink) Old Jan 17th, 20, 9:40 AM Thread Starter
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Re: 496 street/strip combos ?

Quote:
Originally Posted by cstraub View Post
Bolt on a set of AFR265's, mild cam and your all over 600HP if you choose. A little more cam, Vic Jr, and a 950 your all over 650HP.

If you find a set of castings your looking at:
$160 for valves
$260 for spring retainers locks
$ 80 for guides in the heads
$ 50 for rocker studs
Labor
$50 for cleaning
$250
$100 for installing guides
$150 for flat mill
$100 for assembly

$1200 for part and labor + cost of castings. Can you find a set at a swap meet or on FB market place cheaper....yes...tons out there....but what are getting? Every set of heads we have had come it that were fresh.....ready to go.....needed work. Just had a Dart Little M brought to us.....DEAL....$1600. Suppose to be Std bore....... 2 sleeves, 4 inserts in the deck, and bore is 4.165, deck is 8.990". Not such a deal now.
Chris , Im thinking of ordering an entire package from you . My best friend has a 69 Chevelle that you sold him a set of worked offshore heads and they are awesome and the car went from 13.0 to 11.80s with a cam change also bought from you . Do you offer a similar set of budget style bbc heads like the heads he bought for his sbc ?
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post #14 of 44 (permalink) Old Jan 17th, 20, 10:00 AM
 
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Re: 496 street/strip combos ?

Quote:
Originally Posted by 70ssclone View Post
Chris , Im thinking of ordering an entire package from you . My best friend has a 69 Chevelle that you sold him a set of worked offshore heads and they are awesome and the car went from 13.0 to 11.80s with a cam change also bought from you . Do you offer a similar set of budget style bbc heads like the heads he bought for his sbc ?
Drop me a email and I can send you a quote. In the email send me your budget. [email protected]

Chris Straub
Mfg Performance Parts

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Why is it we never have time or money to do it the right way in the beginning but we always have time and money to do it over again?
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post #15 of 44 (permalink) Old Jan 17th, 20, 10:12 AM
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Re: 496 street/strip combos ?

Chris used to have a Promaxx head package that was a good price. I don't know if he still does. But I used the 317 promaxx heads gone through by Scott with all good parts. They were very affordable and a very nice piece for a street car or bracket car. They are on a 496 in a camaro that only made 2 runs and both had lots of problems but so far has gone 10.30's at 134. Depending on the price if Chris is still offering that package I will be considering them for my hydraulic roller 496.

But I'll give you a real world data point. My car in 1996 weighed 3675 with me in it, 540 hp on the dyno and went 11.20's at 118. In good air it went 11.05. So just to show how much hp is needed to accomplish your goal. You don't need a 700hp engine to do it. And low 500's is EASY to make with a mild 496.
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