Well i got the new cam in and broke in...all went well except a few leaks i had to take care of after 5 minutes of break in. The old cam was a Howard 302/312, 268/278@.050, .562/.570 lift on a 108, New cam is a Erson 296/302, 258/264@.050, .562/.562 lift on a 108 installed straight up for now but will eventually go 4 degrees advanced after a bit of track time. A few things ive noticed right off the bat. The new cam dosent diesel at all durring shut down, It actually will idle by itself, unlike the howard, and it idles comfortably at 950 RPM without any tuning yet. I just threw the carb back on the way it was when it came off. Throttle response has increased significantly and the overwhelming gassy smell is much lighter than it was before. So far im thrilled. I got the inner springs back in tonight and all i have to do is set the valves tomorrow and im ready to go. I should be heading to the track October 22nd looking for better track times, just thought id post an update....

What's your compression ratio?

pdq67

Nick,
its a step in the right direction, but still alot of duration. Good luck with your next track outing.

I have to agree 258/264 @ .050 is a lot of cam for a 350ci engine. To make the most of that much cam in that engine you will need compression and have to RPM it to see the benefits. Your car might would most likely be a lot quicker with something in the upper 220's at .050 (230 @ .050 max in a 350). I don;t know all the details of your combor nor it's intended use. If it is going to see serious street time, you are leaving a lot on the table.

Car runs high 11s so its not bad for a 350, but it has 11:1 comp.
Still too much cam I think, even tho its a stick. I'd go with something
around 240-245int. and 245-250exh. I'm guessin its makin around 425hp
to go 114mph if the car is around 3500lbs. Head work and the right cam
would make it right - it could run low 11s.

I have to agree 258/264 @ .050 is a lot of cam for a 350ci engine. To make the most of that much cam in that engine you will need compression and have to RPM it to see the benefits. Your car might would most likely be a lot quicker with something in the upper 220's at .050 (230 @ .050 max in a 350). I don;t know all the details of your combor nor it's intended use. If it is going to see serious street time, you are leaving a lot on the table.

220/230@.050 huh.....sorry man but im LOL right now. Yeah that would run really well with 11.1:1 compression. Serious street time would probably include 600 mile round trips that i used to take with my old cam.

Congrats on getting her back together -- that's a lot of hard wrenching you have behind you. Hope it runs like you want her to . . .

Well i figured id encounter a few responses that I should have gone smaller. If you want to go by DCR, if i advance it 4 degrees im at 8.3 Just about perfect for 92 octane. If you want to go by the Erson tech he said, "thats an excellent cam choice". The power band is 3,800-6,800 so i shouldnt have to wind it too hard. I was shooting for a 6,800 shift point.

67RS502.- That 11.88 was dropping every run at the track without tuning, basically it was the third time id ever been there and i was still trying to feel the car out by changing shift points. Im sure it had alot more in it had i tuned it at all. But i was very displeased with that cam for a ton of reasons so i decided not to even go back without swapping. With tuning my new cam, and the right gear the car's very capable of going much quicker than 11.88. Also im running Brodix RR200's and im under the assumption they are plenty to support the power ill need to go lower 11's.

PDQ- the compression is 11.1:1
Brian- thanks

Congrats on getting her back together -- that's a lot of hard wrenching you have behind you. Hope it runs like you want her to . . .

Eric,Thanks man

I also pulled the heads off and cleaned them up a bit. And while they were off i drilled and tapped them for the water cooling lines you see on brodix heads alot. They come out where a heat riser would be and go to a neck located under the thermostat using 6 AN line. So between trimming my intake, drilling and tapping, cleaning up and putting it all back together it took forever... But i did find out that the gaskets i had on there were a .060 el cheapo i got from a buddy. So i actually gained some compression by going to a .040 gasket...oh well just a side note

I've seen that a lot on serious nitrous motors. I think the extra cooling really helps with cooling the pocket between the two center exhaust valves. Any plans on running N2O? or do you just like trick cooling lines?

I think the Erson guy underestimated a little ;) I think the motor will want to go to 7200 . . . either way it will be a lot more manageable than the cam that was in there.

Nick, did you verify valve to piston clearances? and correct pushrod length?

Eric, I did it because it helps cool the pocket you were talking about. According to my local engine machinist, he said it turns almost into a steam pocket between those valves and recommended doing it, i figured it couldnt hurt.....but it does look cool. And i am going to advance the cam 4* eventually, that should bring the RPM down a hair but the cam card says 3,800-6,800 so i went off that. The Erson guy said that 6,800 RPM was right but it would go a bit further if i needed to pull out the back of the track

Brian, i have to run 8" pushrods. No i didnt check my piston to valve clearance. With less duration it opens later and closes sooner, and with a bit less lift on the same L/S there couldnt be any way for the cam to hit when i had somthing like .180 or .200 of clay on the pistons durring my first check and without a head gasket the valves never touched the clay so i wasnt really worried about it.

what gears do you have? 10's? 56's? or 88's?

Brian, I have 3.89 gears BUT I have a richmond 5 speed. Between the 3.27 first gear and the 1.24 fourth my gearing is somwhere equivilant to somthing like a 4.86 i believe.

Where did it say you had 11:1 compression? Still too much cam for a 350 (IMO). Hope it runs like you want.

Where did it say you had 11:1 compression? Still too much cam for a 350 (IMO). Hope it runs like you want.

on his webpage

Where did it say you had 11:1 compression? Still too much cam for a 350 (IMO). Hope it runs like you want.

Not to be an ass but i personally wouldnt make a recomendation if i didnt know all the critical factors of somones motor.

Well you are coming accross like an ass, just so you know. If you read my first post I said I DID NOT know thwe intended use. Which I stated to get more info. I could care less what cam you choose or how your car runs. I am sure you are faster than I will ever be and know WAY more about cars than I ever will. I did not make a specific recommendation, and you will see I also said you will need compression and/or RPM to take advantage of that cam in a 350, Did you not read that part?

[QUOTE=camaroman7d]Well you are coming accross like an ass.... I could care less what cam you choose or how your car runs. I am sure you are faster than I will ever be and know WAY more about cars than I ever will. [QUOTE]

Come on now partner, you know you're faster, you have a supercharger and 30 more cubes than me, and im sure you know much more than I do about cars.....But you are right about one thing, i can be an ass. :)