Don Terrill’s Speed-Talk

BigBro74 wrote: ↑Tue Jul 07, 2020 5:20 pm Those IK 200s that Eric is offering are perfect for your application- and a very good deal. I like 2.3” mcsa on a 406” deal like you are making.

Yes, I agree. If they do have a 2.3 MCSA. He was unsure when I spoke to him.

Sounds like I need to pass on the used ones.

WOW!! Anyone???

Looking to get a set of heads to fit a 475 to 500 horse 406. Nothing fancy, its just a street engine for cruising. I have been looking at MCSA and checking how efficient they are based on Coefficient of Discharge math. I still very new to the game and still learning, so be kind in your replies. Im n...

If I understand how to calculate CSA and Port Volume for a engine, this is what I came up with. For a 406: 6000 rpm CSA = 2.23 6500 rpm CSA = 2.42 This leaded to figure out my 406 port volume: 6000 rpm port volume = 200 6500 rpm port volume = 216 So, based on this information, if I plan to turn the ...

This is all great information. I just got back from the machine shop and block is already .040 over....so the machinist says its junk. Back to square one. Looks like if I want to do this, a 400 SBC build...going to have to get a new aftermarket block. Why is he calling your block junk at .040"...

1980RS wrote: ↑Thu Jun 25, 2020 11:52 am

tcb3274 wrote: ↑Thu Jun 25, 2020 8:37 am Any other comments?

My 406 with Stock 906 Vortec's went the best of 11.49 last night with the Elgin 1165P hyd cam.

Impressive, not a drag car though.

Any other comments?

What psi is considered ok for 93 octane? 200 psi?

Is there a way to predict cranking compression before a actual build?

All of those cams will be fine at 1/2 point less compression. The 1/2 point difference might show up at the drag strip, but for a street vehicle it would seem like cheap insurance. I understand the reason to take out 1/2 point of compression. However I fell like that is to much, maybe settle on 10....

Well, Im down to three cams. Not sure how they are going to work out with my 10.5 compression, but here they are. All are flat tappets. Mike Jones cam - 284/288 and 228/230 @ .050 for .528/.528 lift on 1.6 rockers and 110 lsa It appears this cam will be around 195 to 210 psi cranking compression on ...

Even though it’s tempting I wouldn’t aim for a specific hp number. For a street car it doesn’t matter if it’s 450 or 500 hp. I would aim for a mild mannered engine with broad Powerband. You should still be able to make burnouts for distance Yes, I agree. Just trying to make sure I can get as much a...

Not enough camshaft for 500 bhp on a 400sbc w ik200 heads How much is needed? Minimum hyd cam Comp Xe284H-10 cam Can use 1.6 or 1.6/1.5 split rr This is a nice street cam in a 400 4 speed car.. Better Comp 294S-10 solid magnum. Summit solid oval cam CT108 Isky 201534 Both get even better w 1.6/1.5 ...

F-BIRD'88 wrote: ↑Mon Jun 22, 2020 10:51 pm Not enough camshaft for 500 bhp on a 400sbc w ik200 heads

How much is needed?