Don Terrill’s Speed-Talk

With good lifters, 20,000+ Being a 632ci engine, it's not going to see much time above 6,500rpm. 20,000 miles???? You serious??? What are you running over the nose, 350 - 400 lbs. :roll: Try 800lbs at max lift. Great thing about these big inch Big Blocks, they need a lot of duration, and don't turn...

Pro Power Engines , I dont think time frame realy cuts it for how long the lifters last, my Isky EZE Max have been in my BBC for 8 years and I run a solid roller with no wear at all.

CamKing wrote: ↑Wed May 04, 2022 9:46 am

bob460 wrote: ↑Tue May 03, 2022 7:56 pm

How many miles will lifters last with them spring pressure's?

With good lifters, 20,000+
Being a 632ci engine, it's not going to see much time above 6,500rpm.

20,000 miles???? You serious??? What are you running over the nose, 350 - 400 lbs.

They're not real aggressive, but how mild can a .500" lobe be ? :wink: You would need 275-300# on the seat, and 780-830 @ Max lift. How many miles will lifters last with them spring pressure's? I would think you would get between 2000-2500 miles with needles at best, maby if your lucky

bob460 wrote: ↑Mon May 02, 2022 11:41 pm This one peak's at 6400rpm on pump gas and 10.75 comp!!

https://www.shafiroff.com/chevy-pump-ga ... d-sr20.php

I believe everything I read on the net. Never the less they dont give out anything on the cam anyway.

I would recommend a 273/283@.050", .500"/.485" Lobe Lift, 115 LSA The reason for the longer exhaust durations, is that with an over-square 2-valve engine, you don't have enough exhaust valve area, so you need to add duration to evacuate the cylinder. Yeah, this is pretty close to wha...

I asked the cam company if timing events would be different with the tunnel ram intake compared to a single 4bbl and this is what he came up with, the extra duration on the exhaust. I dont know the reason behind it but if you look at what GM has with there new 632 EFI crate engine making 1004 HP wit...

Fine, use good lifters & check lash every 1000ks, if they start to open up replace the lifters. Stick with street roller lobes with needle roller lifters. If you use bushed or DLC you can use endurance racing lobes. Keep the idle speed up (1200-1400rpm) to keep oil moving, use quality oil &...

Posted on another site as well but trying to find out how much cam I need to get 1000HP + on a BBC pump gas pro street engine. It will be solid roller, 4.60 by 4.75 stroke running Brodix SR20 heads, tunnel ram intake with 2 x 4500 cards, static comp around 12:1. Would like to achieve the goals with ...

Can some one please explain what these crower lifters are? I'm mainly concerned about the letter "J" in the part number. They are to suit ford .874" with the EDM hole for oiling but don't know what the J distinguishes in the part number. # 66915JX980

Further: ' I think it is important to force the major portion of coolant to stay in the block, until it reaches the rear transfer passages [ into the heads ]. It will then travel the full length of the cyl head as it returns to the front of the engine . This is the way the stock Chev system was des...

Of course it shows a lower temp!!! Coolant, still relatively cool, that should passed through the hottest part of the engine, the heads, picking up heat, gets routed direct to the temp sensor. And it IS all about the flow! =D> =D> Pretty easy to understand, don't you think? Pressure has a bearing o...

ChopperScott, you keep posting all these pics that are all the same with large bypass lines that take away coolant from going through the heads. As mentioned, it cant be a good thing and isn't. -6 or larger lines definetley is a step in the wrong direction. Not rocket science.

450cc 96cc chamber 2.400/1.800 4.600 fixture 2.125 pipe .200 164/123 .300 232/171 .400 310/214 .500 380/255 .600 435/296 .700 485/316 .800 499/330 .900 512/339 1.00 516/344 sr20.jpg this is with 50 degree seats and not 55 reed Just wondering how much the steeper valve seats are worth. I think the B...

They were going from an as cast cylinder head to CNC hi flowing cylinder heads and still using a manifold that suited the cast heads. The ford had an issue in the 4300 - 5000 rpm as the dip in power was there in all tests. I'm sure it was something that could be cleaned up.