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Discussion Starter · #1 ·
Here's the deal...looking to be solidly in the 10.80 range with a pump gas 383. Vehicle weighs 3400, has about 11:1 compression, a solid roller in the mid 250's and .620ish lift, 28" tires, 4.11 gears but they will be swapped for 4.56, a TH350, and an 8" 4500 stall converter. My question is, are Brodix M2 fully CNC'd 227cc Track 1 heads too large for this combination? If they're too big, tell me what you think wouldn't be, as well as what manifold to go with. It is driven on the street and raced, and I'm really not looking to spin it up past 7000. A small shot of nitrous isn't out of the question either, but isn't set in stone yet. Thanks.

Frankie
 

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Taking into account the Brodix head and your pistons, does the chamber size and piston calculate out to 11:1 ?

Street / strip percentage ?
 

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Discussion Starter · #3 ·
Yes, it will be right at about 11:1, maybe slightly higher. I'd say 60% strip 40% street. It gets driven often but not far distances by any means. Like I said, it must run on 93 octane pump gas.

Frankie
 

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I do not consider my self to be an expert, but I am not sure how well that converter is going to do on the street.
 

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Discussion Starter · #5 ·
I do not consider my self to be an expert, but I am not sure how well that converter is going to do on the street.
It drives fine, much better than any inefficient off the shelf 10" 3000 stall shitter.

Anybody have any useful input in these heads??? Too big for a pump gas 383 or no?
 

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We have a set of 215's on our 383 in a 3700# truck wich is also 11:1 and close to the same cam and it runs 11.3 on motor. Our engine guy said that the 230's were to big for us unless we were going to spin it to the moon. We run a victor jr intake on ours.
 

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I think they are a bit big, I'd recomend the AFR 210 comp version, they are plenty. Should put you close to 575 horses or better depending on the details around 68-6900 rpms.
 

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Those heads are a bit much. To fully take advantage of them, you will need to spin the engine past 7000 and this will require more cam too. Another point / point and a half of compression would be ideal with these heads.

A 200-210 port head would be better since you have a pretty heavy car to move. The cam you have now has OK @ 050 numbers but it needs more lift: .670-.690" would be better.

Victor Jr intake would be a good choice.

The cheaper route would be to keep the cam you have, go with a 200-210 port head IF YOU NEED TO BUY HEADS and spray it. Also, the conv will have a higher stall rpm when the engine is sprayed so that is something to keep in mind as well.
 

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I would use the Brodix, but I like big heads and on the bottle there is no such thing as to big. 4500 converter Super Vic all the way.
 

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Those heads and a Super Victor sound a little on the big side if you're not going to spray the bag off of it.

I had a close combo, 3400 lb car 4.56 gear, 28" tall ET streets, Dart Pro 1's 200cc with a little port work a Victor Jr. intake port matched only, 1" carb spacer, 3800 Coan convertor off the shelf, Comp Cams bottom of the page hydraulic roller with 1.6 roller rockers to give it around .600 lift. I did run the motor to 7000 and I did drive to the track. It went a best of 11.10 in "ego air". but always ran in the high 20's anyother time. Footbrake car with 1.54 best 60'.
 

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We have built a few pretty racey Pump Gas 383/388 combinations that run very well at both the track and the street. The quickest one was in a 1970 Nova owned by the shop owner's brother. Eagle cast crank, SIR rods, TRW pistons, custom Crane solid roller that we setup (less than .620" net lift), Canfield 197cc heads, Victor JR, 750HP, 1 3/4" headers, 3" x-pipe exhaust with Magnaflow mufflers then turndowns, 3800 JW converter, PG trans (1.80 gearset), 3.70 gear, 28x10.5 MT slick, etc.

Best run was a 10.69 weighing right at 3300 pounds. Drove great on the street, ran awesome at the track. It was shifted at only 6400 RPM and that was where it ran the best. The motor made a ton of passes in Footbrake, NoBox along with quite a few street miles. Then he went NHRA Super Street racing and after two years of that the crank broke right through one of the rod journals.

During its life we hit it with 150hp worth of nitrous and it ran a bunch of 9.80s. Not too bad for a $200 crank, lol. We talked to the Eagle guys at PRI one year about it and they were really surprised that we hadnt broken the crank when we were making that much power with the nitrous.
 

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We have built a few pretty racey Pump Gas 383/388 combinations that run very well at both the track and the street. The quickest one was in a 1970 Nova owned by the shop owner's brother. Eagle cast crank, SIR rods, TRW pistons, custom Crane solid roller that we setup (less than .620" net lift), Canfield 197cc heads, Victor JR, 750HP, 1 3/4" headers, 3" x-pipe exhaust with Magnaflow mufflers then turndowns, 3800 JW converter, PG trans (1.80 gearset), 3.70 gear, 28x10.5 MT slick, etc.

Best run was a 10.69 weighing right at 3300 pounds. Drove great on the street, ran awesome at the track. It was shifted at only 6400 RPM and that was where it ran the best. The motor made a ton of passes in Footbrake, NoBox along with quite a few street miles. Then he went NHRA Super Street racing and after two years of that the crank broke right through one of the rod journals.

During its life we hit it with 150hp worth of nitrous and it ran a bunch of 9.80s. Not too bad for a $200 crank, lol. We talked to the Eagle guys at PRI one year about it and they were really surprised that we hadnt broken the crank when we were making that much power with the nitrous.

Looks to be a pretty well matched combination for both street/strip manners.
 

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I agree on the 195 AFR heads, they are a great cylinder head for street strip engines under 400"
 

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383 11.3 -1 comp flat top motor
mid to hi 250's at 050 solid roller less than 600 lift
ootb afr 227 eliminators
super vic,1050 carb
4.30 gear 28in tire
3000 pds
through the mufflers in denver at 8800ft density altitude,car runs 10.70s at 128 with tigh nos converter
that combo at sea level in good air will run nines on motor
oh and the motor makes peak power at 6600 rpm
 

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i used to run AFR 210 as cast and out of box on my old 388 that was 11.4:1, motivated my 3700lb going down the track weight to 10.90's

right now i have a 427 sbc with the brodix 100% CNC 227's engine is 11.8:1 and i still run pump gas..and mufflers, ran best of 10.68 @127mph

even ran my 150hp shot, sticking with ALL pump gas from Fly'n J (93 octane) and plugs look perfect, car picked way up...consistant 1.46 60's bracket racing N/A and with the bottle consistant 1.33 tripping the beams on the back tires.

Either way you'll be fine, at least with the 227's you could upgrade cid without spending money on new heads, though the new eliminator 210's would be a kick azz combo on your 383 too.
 
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