Hi Greg, nice to see that you got it done :TU: Looks like a strong engine for a 66GSCONV :Brow: That HP line is flat. This gives me motivation to get mine finished
Yes Joe I saw that 130 # I'm going to call and verify that # At first I didn't like the numbers but after looking at some of the other builds most if not all were 425s and I was trying to obtain some of those # might be unrealistic with a 401. but all in all very happy with it.
Nice to see another engine build finished with great results. :TU: On page #2, I noticed that modified 350 Olds valves were used to correct geometry. Can you give any more information on this? Was this to improve on factory geometry or just that the Olds valves had to be modified to be inline with factory specs. Thanks
Ross the olds valves were used because the valves that gessler had in the heads at first were to long. And Mike did want the geometry right, as close as possible.And I believe the olds are very close to that So we got with SI valves http://www.sivalves.com/ocdomestic_valvesps_olds.html and we wanted to order the sev2496,sev2495 but for 6mo. they kept telling me another mo. so Mike @ AMP got with SI and had them grind down the bigger set of valves the 2.00 and 1.625. thats the only reason. If I had to do it again I would have just sent the heads back to gessler and told him to make right. Big pain in the a!! to find some thing that mike felt good about And I would have gone with the bigger intake 1.92 and theEx.@1.50. Joe I've not had the time to call Mike yet
454 ft lbs of torque!:TU: Are you going to put 454 decals on the air cleaner?:bglasses: Nice to see all the build parts and specs listed. Thanks for posting!
walt, how does this build compare to your dyno 2003 simulater. Are the nunbers about the same? I had hope that this build would have entertained more coversation about the pluses and minues about the parts I selected and the ones that I didn't,and where could I have gotten more horsepower from. Mike thought the cam was about the biggest gain I could have made.
I'd tend to agree that more cam would help. Something like 224*/236* @ .050 on a 110* LSA is what I would tend to go with (108* LSA if you don't mind reduced idle quality & vacuum). The only other place for gains would likely be in the heads. The one set of flow numbers I have for Gessler are good, but not super impressive.
that same cam you have made 400hp and 500 torque to feed a bigger 425 motor. it was on a 110 LSA and your was on a 112 LSA. there was about 7 hp loss putting it on a 112 LSA. wondering about your heads did they flow them after all the valve changes? you made peak hp at 4700 rpms the same as the bigger cam on i thinks it was Teds 401 build. yours only drop off 10 hp at 5200 rpms,
was that a cast or forged piston that TA supplied? ---------- Post added at 05:36 PM ---------- Previous post was at 05:30 PM ---------- do you think they did more LSA because of the port work? i always was taught better flowing head higher LSA
Paul, Greg said they were cast pistons. i think Greg went with a 112 for better idle and gas mileage. yes your right with smaller valves and low flow heads a tighter LSA is suppose to help. even with major porting they will always be low flowing for cubic inch size of a nailhead
Joe, isn't that the cam you were running when you ran a 12.8 something in your car. It should be a nice street cam
yes same one just on a 110 lsa . super fast ramp more ramp speed then some roller cams lots of lift- 505 lift on intake and 490 lift on the exhaust. great street cam, smooth idle, will pull from off idle to 5250 rpms. when comparing cams look at the duration at .200 lift. and not advertise duration.
Joe, just got done talking to Mike and the seat pressure is @130 and the jetting of the carb was so close to what he wanted to see that he didn't think about beating on the motor any more than what we had to.
no i was asking if he had to richen or lean out your carb because i have the same 800 carb i had to lean mine out over the factory settings
OK, this thread made me itchy to work on my 401. I have been doing a little stuff with the goal of starting it up... So I got it started tonight for the first time since the dyno. It sounds wicked, I have lots to check out but the exhaust note was frigging sweet. This is http://www.v8buick.com/showthread.php?152669-Nailhead-Dyno-d&highlight=nailhead+dyno Oh Heck that is from 2008...started right up. in 2013
