Jesse, this is a mild low maintance motor. He doesn't want to run a solid roller. That 230 cam will match up real well with those 195 heads. I have built several 421's and dynoed and drove them myself. The bigger heads will make more power... above 4500rpm. This will have 40+ ftlbs more torque under 4500rpm and more hp than the bigger heads and cam would. I have built the exact motors you are talking about. 421 with the tpis 242/242 cam with AFR 220's, and it makes more power above 4500 rpm, but has much less power below that. Max hp isn't the goal here. I have also done a AFR 220 Comp 248/254, same thing. You give up bottom end and midrange for top end power. The bigger heads and cam would be faster in the quarter mile, but thats not the ultimate goal. This thing should run pretty deep in the 11's. I had a 421 with miniram, AFR 195's ( the old ones), Crane 222/230, and it ran 12.40@113.79 with the DA at 7700 ft. That would have to be a mid 11 car at a good sealevel track, and I could drive it anywhere. And it got 23mpg, and passed emissions.

 

please do not think I was bashing your suggested parts. I was simply stating that he will not suffer from the commented parts in driveability. *IF* the tuning is done correctly you can have a very streetable motor and low maintenance with the items I mentioned above. I set my lash on my MUCH larger cam once a season and run it all year. I do check it on occasion, but it seldom if ever needs adusted...if anything I will change it just to try different setting...but they make very little to no difference.

The FI injection makes these cars very tunable. There was a thread over on the other forum I go to with Joe Sherman and the thread was along these line. The underlying comment was he has not found the limits to which they can get driveability. And when at least I say driveability I mean GOOD street manners.

My cam is in the 27X range with 725 lift and honestly it doesn't feel any different than the 242 cam or even the 219 cam I ran with the 350. The only time you can tell is when you blip the throttle it revs quicker than heck. But the manner are all about the same. With the FI you don't get the effect of huge RPM swings like you get with a carb.

Good discuss none the less - and emissions - that puts everything into a whole new ballpark.

Good luck fellas and keep us posted. I think you will see 10s if you have the traction.

 

Will we get to see pics of this monster as it is being built?

 

Jesse, thanks for your thoughts, but I am only after a solid street driven car that doesnt give me issues while driving, and "if" i can give a stock C6 Z06 a run for its money "straight line" then even better!

Jim has excellent knowledge of what these 421's can do, that's more important then anything.


10's? Not going to happen n/a. I wont be beating this car off the line. E.T. isnt a concern, but a good MPH would be nice.

 

I am hoping so. If Jim can find his camera.

 

Exactly! Jim's old 421 had a 222/230 (not sure on the lift), older afr's, and was trapping 113.79 at 7700ft. Jim what does that 113.79 equal to at sealevel? I will be running a little better cam, and a little better head. Should run hard!

 

That was a pretty small cam. Crane Part number 109831. 222/230 .509 and .528 lift w/!.5 rockers on a 112 lobe sep. You have better heads and more cam than I did and more compression.

The NHRA corrections only go to 5500ft. If I use the 12.40@113.79 figuring 5500ft, that corrects to 11.59@122.11. But if you figure the DA was 2200ft higher than that, it's obviously going to be faster than those numbers.

 

Were in business, I got my camera back

 

This will be an exciting street motor to drive. Ive never been in a more fun car than my 88 Callaway TT that had over 400rwtq from 2600-5200rpm and 500 rwtq from 3-4500rpm. Ive been in faster cars but none more fun to drive.

 

Sounds like a good gameplan

 

I would be more then happy with 122 mph. That's friggin awesome.

 

This is one of the pitfalls with my LT5. I have limits before I have to spend really stupid money to get the HP and trq#'s I would like. Rick, I'm really happy that your doing this. You've waited a long time to build this motor while Monika was in school so now you can have some fun. Should prove to be a really fun summer. Track days will be fun. I'm certain I will be in the 11's but not as deep as you will be buddy. We'll put an event together with the guys and have fun for the day. I think I am more excited than you are! Emissions??? Whats that??? LOL

 

Thanks Mikey. There is just some fine tuning to be deciding on with regards to the combination but the main parts are pretty much set in stone. If you have a weekend free when we are doing the transplant come on up to the new home, and give us a helping hand. Have a good one man!

 

88B, you're in good hands

I've traded pms with Jim and am quite impressed with his technical knowledge, especially with regard to big-inch SBC's. I think you're going to have a VERY fun ride when the dust settles. Of course, your drivetrain is likely to say differently (about being fun)

Keep us posted!

 

Thanks for the kind words Bob

 

Don't worry I will. Jim should have some parts very soon.

 

I likewise have traded emails and had discussions with Jim, and he really seems to be knowledgable on the large cube SBCs. He used to talk with me about moving to FI, but maybe he has enough power with the larger motor now.

I firmly believe that you are in good hands.
Aaron

 

Thanks Aaron

 

I strongly believe that as well. I really think Jim's wants to build a kick ***' engine for me, and that's a good feeling, and yes he has been there, done that.

 

It should be Josh. I have a similar dyno graph of one of Jim's old 421's. But it doesnt seem to want to load up, hmm!