High Compression Race Motor Opinions needed!!!
10-24-2007, 01:19 AM
#1
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High Compression Race Motor Opinions needed!!! Well guys here's the deal....I am about to put a down payment on a truggy that I would eventually like to run in the MDR series (very simular to a trophy truck for those who arent familar) within the next couple of weeks so im starting to think of a good engine to go with. I need as many opinions as I can get. Here are some key factors that are a must.
-Must be naturally aspirated
-Must be lightweight so SB is a must
-750 FWHP
-Must be a very reliable setup
-Dry Sump
Here is a combo I am considering running at this point
First combo
-LSX Block
-4.185" Bore and a 4" stroke yeilding 440ci
-13.5:1 CR
-Either All Pro LS7's or ET's C5X inline valve race heads
-Sheet metal intake
-Hyd roller if possible
-Spin it to 8,000 rpms
Okay let the suggestions begin!!!
-Must be naturally aspirated
-Must be lightweight so SB is a must
-750 FWHP
-Must be a very reliable setup
-Dry Sump
Here is a combo I am considering running at this point
First combo
-LSX Block
-4.185" Bore and a 4" stroke yeilding 440ci
-13.5:1 CR
-Either All Pro LS7's or ET's C5X inline valve race heads
-Sheet metal intake
-Hyd roller if possible
-Spin it to 8,000 rpms
Okay let the suggestions begin!!!
Last edited by adams2003; 10-29-2007 at 05:17 AM.
10-24-2007, 11:20 PM
#3
We've got a customer working on a Trophy truck 427ci. It has a set of our All Pro LSW heads on it and should be on the dyno in the next couple of weeks. It has a C5 R block and dry sump. They're running a GMPP carb intake with a 4bbl ttb and a Motec engine management system. Looking for 700fwhp. and 600lbs of torque from this setup. CR is just under 12:1.
Their next engine will be in the neighborhood of 440ci or larger and will have a Kinsler intake.
Richard
Their next engine will be in the neighborhood of 440ci or larger and will have a Kinsler intake.
Richard
10-25-2007, 04:53 AM
#4
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We are building a 4'' by 4.155 warhawk right know for a road race vette it is 13:1
Uses a HYD roller with a LS7 intake and we are also looking @ 700 fwhp.
It has a Bill Daily dry sump,And If I had to it again I would of put Richards heads on it
Uses a HYD roller with a LS7 intake and we are also looking @ 700 fwhp.
It has a Bill Daily dry sump,And If I had to it again I would of put Richards heads on it
10-25-2007, 09:23 PM
#7
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We've got a customer working on a Trophy truck 427ci. It has a set of our All Pro LSW heads on it and should be on the dyno in the next couple of weeks. It has a C5 R block and dry sump. They're running a GMPP carb intake with a 4bbl ttb and a Motec engine management system. Looking for 700fwhp. and 600lbs of torque from this setup. CR is just under 12:1.
Their next engine will be in the neighborhood of 440ci or larger and will have a Kinsler intake.
Richard
Their next engine will be in the neighborhood of 440ci or larger and will have a Kinsler intake.
Richard
Richard, how much do the all pro lsw's run fully assembled?
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10-25-2007, 09:24 PM
#8
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10-25-2007, 10:27 PM
#9
Well guys here's the deal....I am about to put a down payment on a truggy that I would eventually like to run in the MDR series (very simular to a trophy truck for those who arent familar) within the next couple of weeks so im starting to think of a good engine to go with. I need as many opinions as I can get. Here are some key factors that are a must.
-Must be naturally aspirated
-Must be lightweight so SB is a must and aluminum block would be preferred.
-Needs to make atleast 700 FWHP or closer to 800 would be even better
-Must be kept under 7,000 rpms due to constant tranny failures in this type of vehicle
-Must be a very reliable setup
-Possibly a Dry sump system
-Obviously race fuel will be required for my goals
-Would strongely prefer a hydralic roller if possible
Here is a very basic Combo that I will lay out there and let you guys cratique.....
-Either Warhawk block or Dart billet
-Most likely a 4.125" Bore and a 4" stroke
-13.5:1 CR
-Ported LS7 heads/Intake (open to better suggestions) I am assuming that a sheetmetal intake wouldn't be good for this type of application because of heat soak. So im not sure if there is a better bet for me than the ls7 manifold in this application.
Okay let the suggestions begin!!!
-Must be naturally aspirated
-Must be lightweight so SB is a must and aluminum block would be preferred.
-Needs to make atleast 700 FWHP or closer to 800 would be even better
-Must be kept under 7,000 rpms due to constant tranny failures in this type of vehicle
-Must be a very reliable setup
-Possibly a Dry sump system
-Obviously race fuel will be required for my goals
-Would strongely prefer a hydralic roller if possible
Here is a very basic Combo that I will lay out there and let you guys cratique.....
-Either Warhawk block or Dart billet
-Most likely a 4.125" Bore and a 4" stroke
-13.5:1 CR
-Ported LS7 heads/Intake (open to better suggestions) I am assuming that a sheetmetal intake wouldn't be good for this type of application because of heat soak. So im not sure if there is a better bet for me than the ls7 manifold in this application.
Okay let the suggestions begin!!!
We have been building LS7s for several trophy truck teams competing in SCORE and we have also done several Dakar engines. Give me a call if you like.
10-26-2007, 05:22 AM
#10
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I would love to run one of your motors in this vehicle, but believe it or not this is actually going to be sort of a bugget truggy and I dont think I could afford one of your engines with the cost of the whole project already being high.
10-26-2007, 07:59 AM
#11
With stainless valves and hyd. roller springs a pair of heads will run $3900.00. You'll need to add a Jesel rocker assembly and that costs about $1500.00. If you require mechanical roller cam springs they can add as much a $300.00 to the total cost depending on the springs.
Richard
Richard
10-26-2007, 08:10 AM
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He means SB2 stuff. Circle track guys have been using that stuff for years with great results. I bet it would be cheaper than doing a LSX setup and prob make more power in the end.
I would rethink the aluminum block idea. On a high compression motor you will make more power with an Iron block because it will hold in heat better. Not to mention you can make about 10% more power by upping the cr to 16:1.
10-26-2007, 10:34 AM
#13
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He means SB2 stuff. Circle track guys have been using that stuff for years with great results. I bet it would be cheaper than doing a LSX setup and prob make more power in the end.
I would rethink the aluminum block idea. On a high compression motor you will make more power with an Iron block because it will hold in heat better. Not to mention you can make about 10% more power by upping the cr to 16:1.
I would rethink the aluminum block idea. On a high compression motor you will make more power with an Iron block because it will hold in heat better. Not to mention you can make about 10% more power by upping the cr to 16:1.
Only downside is they are meant to be carbed so you would have to purchase an EFI system and still run a distributor.
on the iron vs aluminum debate the iorn block will last longer, ive seen a few aluminum block crack the case at the motor mounts after a hard landing on a class 1 truck. he switched to motor plates and is fine now, so thats one thing to consider.
10-26-2007, 12:00 PM
#14
We are not as expensive as you think.
10-26-2007, 04:01 PM
#15
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Could someone clarify what a siamese bore is? The info I found on the sb2.2 says it has a max bore of 4.85" (saimese bore). What exactly does that mean? Here is the info I could gather on the chevy sb2.2
GM PART # 12480097
CATEGORY: All
PACK QTY: 1
CORE CHARGE: $0.00
GM LIST: $8,014.00
OUR PRICE: $5,834.19
DESCRIPTION: BLOCK
283 Main size NASCAR SB2.2 Series Block
CNC-machined , cast iron NASCAR competition block
9.025" deck height
4-bolt BASCAR-block specific steel mains, 17 degree splayed caps on center 3 mains
4.115" rough bore
4.85" max bore (siamese bores)
Machined for 58mm roller cam bearings
.875"lifter bores-06AN water drains
45 degree -10AN fornt oil feed and valley scavenge
AN O-ring pipe plugs
(4) center lifter valley drains (drilled and tappeed)
Steam holes drilled betweeen cylinders .750" below deck surface
1/2" NPT water hole on each side of block
Dry sump only(no oil filter boss)
SB2.2 lifter pattern and lobe sprayers
Tested over 800 horsepower
GM PART # 12480097
CATEGORY: All
PACK QTY: 1
CORE CHARGE: $0.00
GM LIST: $8,014.00
OUR PRICE: $5,834.19
DESCRIPTION: BLOCK
283 Main size NASCAR SB2.2 Series Block
CNC-machined , cast iron NASCAR competition block
9.025" deck height
4-bolt BASCAR-block specific steel mains, 17 degree splayed caps on center 3 mains
4.115" rough bore
4.85" max bore (siamese bores)
Machined for 58mm roller cam bearings
.875"lifter bores-06AN water drains
45 degree -10AN fornt oil feed and valley scavenge
AN O-ring pipe plugs
(4) center lifter valley drains (drilled and tappeed)
Steam holes drilled betweeen cylinders .750" below deck surface
1/2" NPT water hole on each side of block
Dry sump only(no oil filter boss)
SB2.2 lifter pattern and lobe sprayers
Tested over 800 horsepower
10-27-2007, 03:22 PM
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10-27-2007, 04:18 PM
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race heads We jsut finished our new C5X inline valve race head. It would work real well with your cubic inch and power requirements. These are very capable of making well over 900 hp. 2.200 1.600 any chamber volume from 35 to 66cc
.100 74 58
.200 128 106
.300 238 194
.400 314 242
.500 347 256
.600 387 264
.700 406 267
.800 421 271 314w 1 7/8 pipe
.100 74 58
.200 128 106
.300 238 194
.400 314 242
.500 347 256
.600 387 264
.700 406 267
.800 421 271 314w 1 7/8 pipe
10-27-2007, 05:04 PM
#20
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We jsut finished our new C5X inline valve race head. It would work real well with your cubic inch and power requirements. These are very capable of making well over 900 hp. 2.200 1.600 any chamber volume from 35 to 66cc
.100 74 58
.200 128 106
.300 238 194
.400 314 242
.500 347 256
.600 387 264
.700 406 267
.800 421 271 314w 1 7/8 pipe
.100 74 58
.200 128 106
.300 238 194
.400 314 242
.500 347 256
.600 387 264
.700 406 267
.800 421 271 314w 1 7/8 pipe
Sounds like a badass head....how much do they run fully assembled?
