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Search found 69 matches

by Bishop540
Sun Mar 29, 2020 2:28 am
Forum: Engine Tech
Topic: 454 Gen 6 performance upgrade
Replies: 6
Views: 316

Re: 454 Gen 6 performance upgrade

Well, I went to look at the engine today and it wasn't a Gen6. Bad pictures on the listing. Looks like the last of the 14015445 blocks of 1990. 2 piece rear seal and a flat tappet, I'm sure. Still a good running engine in its form. The guy said it did one of the Power Tours. I bet the 700 trans ran...
by Bishop540
Sun Mar 29, 2020 1:18 am
Forum: Engine Tech
Topic: 454 Gen 6 performance upgrade
Replies: 6
Views: 316

Re: 454 Gen 6 performance upgrade

Thank you for the replies.
by Bishop540
Sun Mar 29, 2020 1:18 am
Forum: Engine Tech
Topic: 454 Gen 6 performance upgrade
Replies: 6
Views: 316

Re: 454 Gen 6 performance upgrade

Well, I went to look at the engine today and it wasn't a Gen6. Bad pictures on the listing. Looks like the last of the 14015445 blocks of 1990. 2 piece rear seal and a flat tappet, I'm sure. Still a good running engine in its form. The guy said it did one of the Power Tours. I bet the 700 trans ran ...
by Bishop540
Wed Mar 25, 2020 7:49 pm
Forum: Engine Tech
Topic: 454 Gen 6 performance upgrade
Replies: 6
Views: 316

454 Gen 6 performance upgrade

I have a chance to purchase an engine and transmission combo for a project. The engine is a GM crate 454 gen6 with a 700-4r trans that was ran together for 10,000 miles or so -as always, the guy swapped for an LS combo. It will come with everything I need to drop it in, minus the carb. All the acces...
by Bishop540
Mon Jan 06, 2020 8:01 am
Forum: Engine Tech
Topic: Cold lash after 500 miles, yikes!
Replies: 94
Views: 9137

Re: Cold lash after 500 miles, yikes!

I see this thread popped up again. Good thing since I lost it out of sight. For giggles and since I have to recheck and retune my engine, I'll try the method Camking said (valve at max lift and then 360° further to set the valve). Will see if there is any difference. As for the OP's problem. I have...
by Bishop540
Thu Jan 02, 2020 5:21 pm
Forum: Engine Tech
Topic: Cold lash after 500 miles, yikes!
Replies: 94
Views: 9137

Re: Cold lash after 500 miles, yikes!

I ended up using the AFR (made by Harland Sharp) 1.7/1.7 aluminum rockers. I had to grind some clearance on #1 and #8 intakes so it would clear my "stock style" valve covers but other than that they fit well. The sweep centered pretty good over the valve tip and I used the midlift or 90 degrees at h...
by Bishop540
Tue Nov 12, 2019 11:40 pm
Forum: Engine Tech
Topic: BBC Rocker Studs
Replies: 16
Views: 982

Re: BBC Rocker Studs

So I have tried several different rockers to see which ones would give the best centered sweep and lift. Crower 1.7's were about .020 less lift than the others, so they are out. Comp stainless and the AFR's are seeing the best lift. All but the AFR exhaust (used on the intake) give their best lift, ...
by Bishop540
Wed Nov 06, 2019 9:23 am
Forum: Engine Tech
Topic: BBC Rocker Studs
Replies: 16
Views: 982

Re: BBC Rocker Studs

ok. Maybe I shouldn't have given all those details and simply just asked:

1) Is it ok to run the rockers on only the threaded part of the stud?

2) And how many threads on my 7/16 stud is safe?

Thanks.
by Bishop540
Mon Nov 04, 2019 3:48 pm
Forum: Engine Tech
Topic: BBC Rocker Studs
Replies: 16
Views: 982

Re: BBC Rocker Studs

mine are 8.55 / 9.5. My block has been milled to get .005 deck clearance and i'm using a .039 gasket. Are you married to short valve covers ? I think the stud girdle will probably help your situation My redline is 6500. If I am going to need a girdle then I am stopping here and going with shaft roc...
by Bishop540
Mon Nov 04, 2019 2:56 pm
Forum: Engine Tech
Topic: BBC Rocker Studs
Replies: 16
Views: 982

Re: BBC Rocker Studs

The first picture is the difference in my old PRW 1.8's and the new AFR 1.7's. I already have a problem with the new AFR rockers not fitting under my stock-like valve cover. And that was only with 2 of them installed!!!!
by Bishop540
Mon Nov 04, 2019 2:51 pm
Forum: Engine Tech
Topic: BBC Rocker Studs
Replies: 16
Views: 982

Re: BBC Rocker Studs

what length pushrods are you using ? I've run the comp gold rockers for years with the AFR 325 and then the AFR 335 head. My current cam is .765/.731 lift so its fairly healthy. I also use the AFR stud girdle. Last season i ran scorpion 1.8 race rockers on the intake valves with no problems. The sw...
by Bishop540
Mon Nov 04, 2019 2:25 pm
Forum: Engine Tech
Topic: BBC Rocker Studs
Replies: 16
Views: 982

BBC Rocker Studs

Changing my old PRW 1.8/1.7 stainless roller rockers after 1300 miles because they are wearing out and effecting my lash. The 1.8's are wearing the fastest. I am going down to a 1.7/1.7 ratio, since that is what my cam was designed for (Lunati 502A5LUN). I hear AFR has a roller rocker design made by...
by Bishop540
Mon Sep 09, 2019 5:25 pm
Forum: Engine Tech
Topic: Cold lash after 500 miles, yikes!
Replies: 94
Views: 9137

Re: Cold lash after 500 miles, yikes!

i have the 1.8 scorpion race rockers on the intake valves. Last winter when the heads were off i ground a little metal out of the inside of the guideplate because those rockers move the pushrod closer to the stud. I'm using the AFR 335 heads. Brian Do you have "stock-like" guideplates or the adjust...
by Bishop540
Mon Sep 09, 2019 11:20 am
Forum: Engine Tech
Topic: Cold lash after 500 miles, yikes!
Replies: 94
Views: 9137

Re: Cold lash after 500 miles, yikes!

I've been using comp gold rockers on my 555 with AFR 335 heads for a number of years now. One needed a little clearancing near the front top drivers side valve cover bolt depending on what valve covers you have. I'm also currently running 1.8 scorpion race series rockers on my intake valves. If you...
by Bishop540
Mon Sep 09, 2019 11:13 am
Forum: Engine Tech
Topic: Cold lash after 500 miles, yikes!
Replies: 94
Views: 9137

Re: Cold lash after 500 miles, yikes!

The reason I settled on the PRW's was the extra lift they gave and I got a decent witness mark. I tried all other brand Stainless Steel, even Crower, and their offset design, and never got a good sweep. I am looking for someone who has the AFR 325/335 -pre2013- "s" heads. I would like to compare not...