Well, people may do it, that doesn't mean it makes sense. My track car is a 60 over 427 (438ci) and it has 325cc heads, which are about the right size. True, if it were a street car I would use a smaller head. But I can't see why you want to transplant the Opti and the mediocre heads to an exotic race block. It makes no sense to me. If you want a big inch small block, just ditch the LT1 (and the 23 degree heads).

Rich

 

The opti only sucks because of it's location. From a performance standpoint, it provides very accurate ignition and fuel timing. If you change the cap and rotor to coil over plug, you've pretty much got the best sytem possible. Optical cam/crank sensors are more accurate than magnetic or hall effect. If GM hadn't been so moronic and used a gear drive (so it could sit upright) it would have been much more well received.

 

I really enjoy my LT1, have for a long time...but recently I had my eyes opened and I realized that staying on the LT1 track for where I want to go is impractical financially and a time bomb.

This being said, I have realized that to really get what I want I will be going old school SBC, dart block, 18 deg heads, probably a FAST system(still looking into this one), but basically, all I will have is a newer car body built around a bullet proof old school SBC.

You basically just have to make a goal and build a motor that can exceed it IMO.

 

90% of the people on this forum use there cars as street cars in one way or another so the Track Car that sits on a trailer 6 out of 7 days is not what most are looking for. If a 434 can be made in a LT1 form factor and Dart could, make the block for a similar price to the Little M (Under $2000). Then people such as my self that drive our cars every day could have a monster motor and a car with plenty of drivability and decent gas mileage. If you want to build an all out race motor then you will need the huge heads your talking about but you will also need a very light car to deal with the larger typical 18 deg. Intake runners (260cc+) not to mention the suspention work. There is a very big diference between building a motor for around $10 (My 383 was 7K) and what you spent on your race car.

Here are two 434's with 23-degree heads in the low 10's and both cars are still run on the street. Keep in mind that both of these are still Independent rear suspension and running 700R tranys.


http://temp.corvetteforum.net/c4/ski_dwn_it/

Here is his build up and flow numbers for the heads
http://temp.corvetteforum.net/c4/ski..._mods_page.htm

http://hometown.aol.com/corkvette1/myhomepage/auto.html

 

ejfagala - I see you have dynoed your setup? Very nice numbers. Boston is under 8" of snow at the moment, but as soon as the weather warms up I will be heading over to Mr. Dyno fora visit I hope I make your numbers!

 

I am sure you will make plenty of power. I had a miss and an exhause leak so i think there is another 6-10 in this set up easy but the motor did exactly what I desined it to do and has got better MPG then expected, gota love EFI. Good luck at the dyno and it looks like this is bostons year, both the Sox and noe the Pats.

 

i think they both would sell good, better heads and a larger ci block, reason being ... most aren't into the technical conversions, parts replaceing is easy....imo

 

My next motor will be ~440 ci aluminum sbc and no... it won't be an "Lt1". That's just a waste of time & $ for an engine of this potential.

-Mindgame