Chronicles of a 9 Second 305 Trans Am, Finally V3 Thread....
#51
Re: Chronicles of a 9 Second 305 Trans Am, Finally V3 Thread....
Think I might be taking some advice from the old school on this build, as my pops recommended a grind on the cam that he ran on the street back in the day with his old 327 Corvette, but more of an updated version of it. This engine isn't going roller because it didn't come roller, plus it honestly defeats the purpose for me to invest in linked roller lifters. The Comp Cams roller rockers I am running will help add a little more lift, though...
228/230 395"/401" @ 110...
228/230 395"/401" @ 110...
#55
Re: Chronicles of a 9 Second 305 Trans Am, Finally V3 Thread....
Originally Posted by project89
234/234 .510/.510 on 112
#57
Re: Chronicles of a 9 Second 305 Trans Am, Finally V3 Thread....
Originally Posted by Orr89RocZ
More cam relies less on boost tho i like big cams
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Re: Chronicles of a 9 Second 305 Trans Am, Finally V3 Thread....
that cam would be just fine on a 305, turn it an extra 4-600 rpms
it is only mariginally bigger then what u were thinking of anyway and the 2 extra * of lsa would make it idle and drive the same as the smaller cam
if u stuck 1.6 rockers on the cam ur thinking of u would have around 233/233
it is only mariginally bigger then what u were thinking of anyway and the 2 extra * of lsa would make it idle and drive the same as the smaller cam
if u stuck 1.6 rockers on the cam ur thinking of u would have around 233/233
#59
Re: Chronicles of a 9 Second 305 Trans Am, Finally V3 Thread....
Originally Posted by project89
that cam would be just fine on a 305...
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Re: Chronicles of a 9 Second 305 Trans Am, Finally V3 Thread....
do i have to go buy a 305 car next lol
meh streetable = car can sit in stop and go traffic and not over heat, and u can hear the radio while cruising lmao
meh streetable = car can sit in stop and go traffic and not over heat, and u can hear the radio while cruising lmao
#62
Re: Chronicles of a 9 Second 305 Trans Am, Finally V3 Thread....
Originally Posted by project89
do i have to go buy a 305 car next lol
Originally Posted by project89
meh streetable = car can sit in stop and go traffic and not over heat, and u can hear the radio while cruising lmao
#63
Re: Chronicles of a 9 Second 305 Trans Am, Finally V3 Thread....
Originally Posted by mw66nova
Had a solid flat tappet in one of my 305 builds, 230/240 on a 114, it wasn't too bad. I have a 230/230 on a 110 in it right now and it idles and drives fine...
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Re: Chronicles of a 9 Second 305 Trans Am, Finally V3 Thread....
#65
Re: Chronicles of a 9 Second 305 Trans Am, Finally V3 Thread....
Originally Posted by project89
no 305's for me lmao...
#66
Re: Chronicles of a 9 Second 305 Trans Am, Finally V3 Thread....
I dunno about the 228@.050 cam, I'm more inclined to think split pattern as the heads are probably weaker on the exhaust. The intake's gonna choke it some so it could work out a split cam is more optimal than I give it credit for. Then again the turbos aren't gonna be choosy either really. I'd be sure to size to a decent turbine housing (.96) if I was going to do it. The 110 LSA on a 228 degree cam is probably still a tamer cam than a 112 LSA 234 degree cam. It should have a broader power band as well.
That being said ultimately it's your motor and if she runs 9s well then mission accomplished. Personally I think I'd rather have more intake than more cam, as ported or not I'd still think the TPI is gonna suck some power.
That being said ultimately it's your motor and if she runs 9s well then mission accomplished. Personally I think I'd rather have more intake than more cam, as ported or not I'd still think the TPI is gonna suck some power.
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Re: Chronicles of a 9 Second 305 Trans Am, Finally V3 Thread....
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Re: Chronicles of a 9 Second 305 Trans Am, Finally V3 Thread....
Guessing he matched the cam to take advantage of how the heads may like.
I can appreciate "working with what ya got just to see what you wind up with" but better than any aftermarket head? Im curious.
Did the flow #s get taken down didnt see them posted.
not on here a lot
I can appreciate "working with what ya got just to see what you wind up with" but better than any aftermarket head? Im curious.
Did the flow #s get taken down didnt see them posted.
not on here a lot
#71
Re: Chronicles of a 9 Second 305 Trans Am, Finally V3 Thread....
Guessing he matched the cam to take advantage of how the heads may like.
I can appreciate "working with what ya got just to see what you wind up with" but better than any aftermarket head? Im curious.
Did the flow #s get taken down didnt see them posted.
not on here a lot
I can appreciate "working with what ya got just to see what you wind up with" but better than any aftermarket head? Im curious.
Did the flow #s get taken down didnt see them posted.
not on here a lot
I've said it once and I'll say it again, it's not like you need a ton of flow to feed a 305 from a bench racing stand point especially not a boosted one.
#72
Re: Chronicles of a 9 Second 305 Trans Am, Finally V3 Thread....
Originally Posted by fasteddi
If you build them the V8 ppl will come
Originally Posted by kmcn47
what he said http://www.youtube.com/watch?v=hU3a1PDtTYk
"People will come Ray"...
Followed by...
"Your broke Ray"...
... and I just started cracking up lmao!
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Re: Chronicles of a 9 Second 305 Trans Am, Finally V3 Thread....
Ahh you know im just messing arround Rob. And BTW that vid is funny as he$$
#74
Re: Chronicles of a 9 Second 305 Trans Am, Finally V3 Thread....
Originally Posted by cuisinartvette
I can appreciate "working with what ya got just to see what you wind up with" but better than any aftermarket head? Im curious.
Did the flow #s get taken down didnt see them posted.
Did the flow #s get taken down didnt see them posted.
Its hard to see the "ramp" in the before pic on the left, but at mid point on the right most of the ramp was essentially removed. Current pictures which I will throw up after I polish them will show how the ramp is now gone altogether, and the valve area where unshrouded looks perfect, smooth and equal on both sides. Plenty of valve guide left down on the bottom, but either way I wasn't worried about removing them, as I am not planning over one hundred thousand miles with these heads. Again, this was only after 20-30 minutes on the chamber, and the shape of everything looks rough in the pic because it is raw, as this was during the removal process, not the shaping and smoothing process, and I am throwing these up for the chronicle...
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Re: Chronicles of a 9 Second 305 Trans Am, Finally V3 Thread....
Just thinking out loud.
On the big blocks GM put a notch in the top side of the bore to help with shrouding and their valve placement. I dont see why this couldnt be done with the 305 too esp if someone wanted a larger valve.
It was explained to me you can unshroud the chambers all you want and make heads flow to timbucktu but if the air gets to where its ramming intot eh side of the cyl youre losing power. Id guess with boost might be enhanced.
Know some cicle track guys that like to cheat do this
May post about it somewhere else and throw up a link.
On the big blocks GM put a notch in the top side of the bore to help with shrouding and their valve placement. I dont see why this couldnt be done with the 305 too esp if someone wanted a larger valve.
It was explained to me you can unshroud the chambers all you want and make heads flow to timbucktu but if the air gets to where its ramming intot eh side of the cyl youre losing power. Id guess with boost might be enhanced.
Know some cicle track guys that like to cheat do this
May post about it somewhere else and throw up a link.
#76
Re: Chronicles of a 9 Second 305 Trans Am, Finally V3 Thread....
Originally Posted by cuisinartvette
It was explained to me you can unshroud the chambers all you want and make heads flow to timbucktu but if the air gets to where its ramming intot eh side of the cyl youre losing power. Id guess with boost might be enhanced...
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Re: Chronicles of a 9 Second 305 Trans Am, Finally V3 Thread....
Waiting And Watching...
Im very exciting to see the finished product..
Im very exciting to see the finished product..
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Re: Chronicles of a 9 Second 305 Trans Am, Finally V3 Thread....
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Re: Chronicles of a 9 Second 305 Trans Am, Finally V3 Thread....
I wonder how the head flow effects the adiabatic efficiency.
I'm thinking that the better flowing head will keep the compressor from working as hard, generate less heat, allow for more timing and a leaner (more power) AFR..
-- Joe
I'm thinking that the better flowing head will keep the compressor from working as hard, generate less heat, allow for more timing and a leaner (more power) AFR..
-- Joe
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Re: Chronicles of a 9 Second 305 Trans Am, Finally V3 Thread....
i would agree. its still all about getting air into and out of the cylinders. if you can move the same amount of air at a lower pressure, there is benefits to be had. more power with less turbo/boost pressure....
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Re: Chronicles of a 9 Second 305 Trans Am, Finally V3 Thread....
I would love to see the maps showing the T72 wheel out flows the T88 wheel. Got maps?
#82
Re: Chronicles of a 9 Second 305 Trans Am, Finally V3 Thread....
Originally Posted by junkcltr
I would love to see the maps showing the T72 wheel out flows the T88 wheel. Got maps?
#83
Re: Chronicles of a 9 Second 305 Trans Am, Finally V3 Thread....
Originally Posted by GenX'Motorsport
Waiting And Watching...
Im very exciting to see the finished product..
Im very exciting to see the finished product..
Originally Posted by irocZ281986
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Originally Posted by anesthes
I wonder how the head flow effects the adiabatic efficiency.
I'm thinking that the better flowing head will keep the compressor from working as hard, generate less heat, allow for more timing and a leaner (more power) AFR..
-- Joe
I'm thinking that the better flowing head will keep the compressor from working as hard, generate less heat, allow for more timing and a leaner (more power) AFR..
-- Joe
Originally Posted by DIGGLER
i would agree. its still all about getting air into and out of the cylinders. if you can move the same amount of air at a lower pressure, there is benefits to be had. more power with less turbo/boost pressure....
#86
Re: Chronicles of a 9 Second 305 Trans Am, Finally V3 Thread....
Originally Posted by kmcn47
and then all was quiet?
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