Anyone spraying 300 or more?
10-05-2005, 07:26 PM
#1
Launching!
Thread Starter
Join Date: Sep 2005
Location: dallas
Posts: 218
Likes: 0
Received 0 Likes
on
0 Posts
Anyone spraying 300 or more? I am building a 408iron block and i heard that once you go over 300,everytime you spray something will go wrong everytime. I am trying to make it nasty for all those guys in chicago.let me know if its ok or what i will need to make it happen.
10-06-2005, 08:21 AM
#4
Banned
iTrader: (19)
Join Date: Jun 2005
Location: chitown
Posts: 1,879
Likes: 0
Received 0 Likes
on
0 Posts
all us guys in chicago??? wtf for?
anyways... i don't see why 300 is the magic number for things to go wrong... i know a car that's spraying a 200 wet shot, and a 125 dry shot on top of it that was doing fine. that was a stock block, stock crank car with a hydraulic cam. as long as you have the fuel for it, and a good tune....... you should be okay as far as the motor is concerned. drivetrain....... of course putting that much power through a trans and rear end is a lot to ask. so make sure you have a very well built trans and a 12 bolt or 9" rear.
my guess is with that combo you'd probably put a th-400 in it anyways.
anyways... i don't see why 300 is the magic number for things to go wrong... i know a car that's spraying a 200 wet shot, and a 125 dry shot on top of it that was doing fine. that was a stock block, stock crank car with a hydraulic cam. as long as you have the fuel for it, and a good tune....... you should be okay as far as the motor is concerned. drivetrain....... of course putting that much power through a trans and rear end is a lot to ask. so make sure you have a very well built trans and a 12 bolt or 9" rear.
my guess is with that combo you'd probably put a th-400 in it anyways.
10-06-2005, 08:31 AM
#5
10 Second Club
iTrader: (9)
Join Date: Jan 2004
Location: Daytona Beach, FL
Posts: 560
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by 2nasty
I am building a 408iron block and i heard that once you go over 300,everytime you spray something will go wrong everytime. I am trying to make it nasty for all those guys in chicago.let me know if its ok or what i will need to make it happen.
I think people are having problems keep the heads down with that much spray.
10-06-2005, 09:24 AM
#6
8 second mod
iTrader: (37)
Join Date: Nov 2002
Location: East Side Performance! mASShole
Posts: 17,879
Likes: 0
Received 0 Likes
on
0 Posts
i am giving 300 a shot next time out!
but in the 750 rwhp range on spray, it seems the heads want to start to lift. not always, but alot.
but in the 750 rwhp range on spray, it seems the heads want to start to lift. not always, but alot.
10-06-2005, 09:31 AM
#7
Originally Posted by 2nasty
I am building a 408iron block and i heard that once you go over 300,everytime you spray something will go wrong everytime. I am trying to make it nasty for all those guys in chicago.let me know if its ok or what i will need to make it happen.
Trending Topics
10-06-2005, 11:30 AM
#11
8 second mod
iTrader: (37)
Join Date: Nov 2002
Location: East Side Performance! mASShole
Posts: 17,879
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by next
It might be the 400 shot size that starts to create a few challenges 
no one else has a water issue. lol
10-06-2005, 12:43 PM
#12
Honestly, I think the tune has more to do with lifting heads and water issues than the size of the shot! Also, smaller cubed motors create less cylinder pressure. I think you more likely to lift a head on a 408+ ci motor rather than a 347 ci motor, with the same size shot.
10-06-2005, 01:48 PM
#13
TECH Veteran
iTrader: (33)
Join Date: Nov 2001
Location: Port Richey
Posts: 4,266
Likes: 0
Received 0 Likes
on
0 Posts
Mike...I have seen you say that a few times now. I am just curious why a 347 making 800 rwhp would have less cylinder pressure than a 408 making 800rwhp? Or better yet why a 347 making 800 ft/lbs at 5000 rpm would have lower cylinder pressure than a 408 making 800 ft/lbs at 5000 rpm?
Power paremters being equal....the larger cubed motr will have the lower avg cylinder pressure.
However...I absolutley agree that the tune is the key....along with the approach to get those big HP #s.
this was a too rich 450 shot on a mild 408
Power paremters being equal....the larger cubed motr will have the lower avg cylinder pressure.
However...I absolutley agree that the tune is the key....along with the approach to get those big HP #s.
this was a too rich 450 shot on a mild 408
10-06-2005, 01:58 PM
#14
TECH Junkie
iTrader: (9)
Join Date: Jun 2003
Location: Winter Garden, Florida
Posts: 3,428
Likes: 0
Received 0 Likes
on
0 Posts
I think the greater volume of more c.i. would have a lower cylinder pressure than a smaller cube motor on the same shot.
Yes, I agree that the tune is very key. I also believe that there is something else that is overlooked. Time under pressure. Do a 2 stage setup and you'll be able to reduce the amount of time that the cylinder is seeing those super high pressures. Try hitting it with one kit for a full 8-9 second pass and it's a little tougher.
Yes, I agree that the tune is very key. I also believe that there is something else that is overlooked. Time under pressure. Do a 2 stage setup and you'll be able to reduce the amount of time that the cylinder is seeing those super high pressures. Try hitting it with one kit for a full 8-9 second pass and it's a little tougher.
10-06-2005, 02:01 PM
#15
TECH Veteran
iTrader: (33)
Join Date: Nov 2001
Location: Port Richey
Posts: 4,266
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by next
I also believe that there is something else that is overlooked. Time under pressure. Do a 2 stage setup and you'll be able to reduce the amount of time that the cylinder is seeing those super high pressures. Try hitting it with one kit for a full 8-9 second pass and it's a little tougher.
Absolutely
10-06-2005, 02:13 PM
#16
8 Second Club
iTrader: (1)
Join Date: Nov 2001
Location: Friendswood
Posts: 10,121
Likes: 0
Received 0 Likes
on
0 Posts
I've sprayed 400 like 7 or 8 times on No o-ringed, Felpro gaskets, and basic ARP Head studs. I popped a gasket because of some 6 month old C16.... My own fault!!
Noyzee its made enough passes.. Also made alot more then 750 on a 300 shot
Noyzee its made enough passes.. Also made alot more then 750 on a 300 shot
10-06-2005, 02:16 PM
#17
TECH Junkie
iTrader: (9)
Join Date: Jun 2003
Location: Winter Garden, Florida
Posts: 3,428
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Mr Powell
I've sprayed 400 like 7 or 8 times on No o-ringed, Felpro gaskets, and basic ARP Head studs. I popped a gasket because of some 6 month old C16.... My own fault!!
Noyzee its made enough passes.. Also made alot more then 750 on a 300 shot
Noyzee its made enough passes.. Also made alot more then 750 on a 300 shot
10-06-2005, 02:19 PM
#18
I always looked at it this way, the larger the cylinder, the greater the chance to fill that cylinder up with pressure.
If you took an air tight room that was 5'x5' and filled it up with air and you took a room 15'x15' and filled it up with air, which would have the greater pressure of the 2?
Am I wrong?
If you took an air tight room that was 5'x5' and filled it up with air and you took a room 15'x15' and filled it up with air, which would have the greater pressure of the 2?
Am I wrong?
10-06-2005, 02:28 PM
#20
TECH Junkie
iTrader: (9)
Join Date: Jun 2003
Location: Winter Garden, Florida
Posts: 3,428
Likes: 0
Received 0 Likes
on
0 Posts
Mike - I think a good example would be to start with two equal volumes of gas. Fill a large balloon and then a small one. The smaller one would see more pressure on the ballon itself.
Chris - I think you have seen some successes with your setup. But I still think a major key is time under pressure.
Chris - I think you have seen some successes with your setup. But I still think a major key is time under pressure.