Who built your 408?
Originally Posted by Elite_Hot_Rod
Your set up is just about the same as mine, what kind of power does it make?
Originally Posted by DAPSUPRSLO
Wen both are ported properly there is no comparison, especially in the higher lifts areas where any lsx style manifold really limits the true potential of a head. I think you're right about the gmpp intake though, I believe the fast is superior up to about the .550" or so area, then it's all gmpp.
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the VJ is a little taller, and has other nice-ities, like oring for orings for gaskests...
I was lookin at a friend of mine's VJ the other day, looks llike a quality piece, just most likely going to have to cut the cowl, even with a flange style TB.
Now the gmpp can be fit w/o cutting, there were pictures posted a few days ago...
Elite_hot_rod, not everyone has the tools/time/ability to build a motor. I feel comfortable putting a motor together, (helped on a couple) but paying for machine work, balancing, etc can sometimes outweigh the price of a shortblock from some vendors.
I've seen some prices on HPEs 408s that a few guys on here have, and they are cheap(as far as a 408 goes), and I doubt much could be saved by building compared to buying... and waranty helps too...
I was lookin at a friend of mine's VJ the other day, looks llike a quality piece, just most likely going to have to cut the cowl, even with a flange style TB.
Now the gmpp can be fit w/o cutting, there were pictures posted a few days ago...
Elite_hot_rod, not everyone has the tools/time/ability to build a motor. I feel comfortable putting a motor together, (helped on a couple) but paying for machine work, balancing, etc can sometimes outweigh the price of a shortblock from some vendors.
I've seen some prices on HPEs 408s that a few guys on here have, and they are cheap(as far as a 408 goes), and I doubt much could be saved by building compared to buying... and waranty helps too...
Originally Posted by 30th t/a
im marks buddy. he never dyno'd it. he does all his own tuning with HP tuners. the 1st time at the track he went 11.17@122 1.62 60'. he had skinnies up front, 17" in the rear w/ MT street radials. full interior. very bad weather, hot and humid. plus his A/F was rich from 5300rpm up. he leaned it out for the next pass but blew his stock rear on that pass. he will see mid 10s NA when he gets it tweaked and gets in some good weather.
The A/F went rich I found out because the COT (cat over temp protection) was kicking in and sent my A/F to 11.9:1. The new rear is in and I will be ready for Thursday night. I built this motor and like previously stated, save your money and put good internals in it. My crank and rods are Lunati and I have Diamond pistons. There isn't a dyno close to me so I don;t have any dyno numbers, track times will have to do for now. That is what really matters to me anyway.
Fitment isnt a concern for me it is in a swapped vehicle and I will need to cut anyway.
I am more concerned if there is any performance difference between the two.
Oh and TSP built my motor. Very reasonable price and used quality parts throughout
I am more concerned if there is any performance difference between the two.
Oh and TSP built my motor. Very reasonable price and used quality parts throughout
Bill Vice in Omaha, NB built my shortblock.
made 550/515 with a 'small' 246/250 cam and 1 7/8 headers. heads I got for $1000 from cylinderheadspecialties
made 545/535 with 1 3/4 headers
made 550/515 with a 'small' 246/250 cam and 1 7/8 headers. heads I got for $1000 from cylinderheadspecialties
made 545/535 with 1 3/4 headers
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Joined: Feb 2002
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From: Lewisville, Texas
I was just curious, I've always thought mine was a bit low at 485 RWHP thru the glide and a 9" with 3:55 gears but as you say it doesn't really matter, what matters is what it does on the track.
Originally Posted by 2001 Pewter WS6
Damn you got a good memory...
The A/F went rich I found out because the COT (cat over temp protection) was kicking in and sent my A/F to 11.9:1. The new rear is in and I will be ready for Thursday night. I built this motor and like previously stated, save your money and put good internals in it. My crank and rods are Lunati and I have Diamond pistons. There isn't a dyno close to me so I don;t have any dyno numbers, track times will have to do for now. That is what really matters to me anyway.
The A/F went rich I found out because the COT (cat over temp protection) was kicking in and sent my A/F to 11.9:1. The new rear is in and I will be ready for Thursday night. I built this motor and like previously stated, save your money and put good internals in it. My crank and rods are Lunati and I have Diamond pistons. There isn't a dyno close to me so I don;t have any dyno numbers, track times will have to do for now. That is what really matters to me anyway.
Originally Posted by Elite_Hot_Rod
I was just curious, I've always thought mine was a bit low at 485 RWHP thru the glide and a 9" with 3:55 gears but as you say it doesn't really matter, what matters is what it does on the track.
Originally Posted by ArcticZ28
HPE built mine. It actually just arrived. I went with them because of recommendations and talked with Erik for a while, who definitely knows his sh*t. HPE also does their own machining/building in shop, which not many others do. It's all up to you, I just felt most comfortable with them.
9 Second Club
Joined: Jul 2003
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Originally Posted by Elite_Hot_Rod
I was just curious, I've always thought mine was a bit low at 485 RWHP thru the glide and a 9" with 3:55 gears but as you say it doesn't really matter, what matters is what it does on the track.
I built Mark's 408 motor
I have built a 408 and a 410 for myself.
when mark said he build it.
Originally Posted by 383ss
Bill Vice in Omaha, NB built my shortblock.
made 550/515 with a 'small' 246/250 cam and 1 7/8 headers. heads I got for $1000 from cylinderheadspecialties
made 545/535 with 1 3/4 headers
made 550/515 with a 'small' 246/250 cam and 1 7/8 headers. heads I got for $1000 from cylinderheadspecialties
made 545/535 with 1 3/4 headers
I'd rather have +20tq and -5 hp than the other way around.
