Power Estimates?
Thread Starter
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Power Estimates? Putting together a new combination. What do you think it will make? Suggestions appreciated. Parts listed are parts that I have. Want to get a 3200lb race weight car to the 5.50's - 6.0s no prep and still drivable.
403 Ci ls2
Forged internals.
k464x05 pistons -3CC
.040 gasket
12.2 compression
~.04 quench
Port matched ls3 Fast 102 with mid length runners
TEA trickflow 255s milled to 63CC
Johnson reduced travel lifters
BTR v2 rockers.
btr assembled and shimmed .660 plats
242/256 110+4 .646 cam
manual rack and brakes.
factory WP
1.875 headers and dual 3" exhaust
NX Plate kit. spraying 150 to 300 progressed (may go direct depending on how it works out)
Maybe close to 670fwhp na?
403 Ci ls2
Forged internals.
k464x05 pistons -3CC
.040 gasket
12.2 compression
~.04 quench
Port matched ls3 Fast 102 with mid length runners
TEA trickflow 255s milled to 63CC
Johnson reduced travel lifters
BTR v2 rockers.
btr assembled and shimmed .660 plats
242/256 110+4 .646 cam
manual rack and brakes.
factory WP
1.875 headers and dual 3" exhaust
NX Plate kit. spraying 150 to 300 progressed (may go direct depending on how it works out)
Maybe close to 670fwhp na?
Thread Starter
On The Tree
Joined: Feb 2023
Posts: 109
Likes: 59
that's not bad, mamo heads seem to make great numbers. i was hoping to run mine out a bit more hence the ls3 top end. Hopefully it will run out to 7500ish.
Putting together a new combination. What do you think it will make? Suggestions appreciated. Parts listed are parts that I have. Want to get a 3200lb race weight car to the 5.50's - 6.0s no prep and still drivable.
403 Ci ls2
Forged internals.
k464x05 pistons -3CC
.040 gasket
12.2 compression
~.04 quench
Port matched ls3 Fast 102 with mid length runners
TEA trickflow 255s milled to 63CC
Johnson reduced travel lifters
BTR v2 rockers.
btr assembled and shimmed .660 plats
242/256 110+4 .646 cam
manual rack and brakes.
factory WP
1.875 headers and dual 3" exhaust
NX Plate kit. spraying 150 to 300 progressed (may go direct depending on how it works out)
Maybe close to 670fwhp na?
403 Ci ls2
Forged internals.
k464x05 pistons -3CC
.040 gasket
12.2 compression
~.04 quench
Port matched ls3 Fast 102 with mid length runners
TEA trickflow 255s milled to 63CC
Johnson reduced travel lifters
BTR v2 rockers.
btr assembled and shimmed .660 plats
242/256 110+4 .646 cam
manual rack and brakes.
factory WP
1.875 headers and dual 3" exhaust
NX Plate kit. spraying 150 to 300 progressed (may go direct depending on how it works out)
Maybe close to 670fwhp na?
Just asking because I would recommend a different LS3 head. It's ok though, they are not bad at all. I would definitely do a 2in header though. What valves are in the heads? Hollow or solid? Considering you want to turn it up, hollow or Ti is the way to go.
Thread Starter
On The Tree
Joined: Feb 2023
Posts: 109
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lots of people i talked to were biased eiher towards afr or tfs heads, the heads are from tooley and were shipped by TEA so i may have to ask them if they incorporate their hollow valves. I was looking into 2" headers, may go that route once it comes apart. and ceramic coated
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lots of people i talked to were biased eiher towards afr or tfs heads, the heads are from tooley and were shipped by TEA so i may have to ask them if they incorporate their hollow valves. I was looking into 2" headers, may go that route once it comes apart. and ceramic coated
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Thread Starter
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I had the masts and prc on my radar but opted for the tfs because of availability, price and for the port size had really strong numbers. Assuming the data is legit. They should hopefully perform well with the aggressive street cam and shorter 6" fast runners.
But based on what they did on my 427ci LS3, I would rate the AFRs as the better product.....but I do like my PRCs! ;-)
KW
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Just some personal expirience: The .660 BTR spings in my LS7 heads only lasted about 6months being rev'd out to 7500rpms almost daily. They started to float after that. I was running stainless valves which are probably heavier than what you are going to run. Just something to be aware of and keep an eye on.
Thread Starter
On The Tree
Joined: Feb 2023
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Just some personal expirience: The .660 BTR spings in my LS7 heads only lasted about 6months being rev'd out to 7500rpms almost daily. They started to float after that. I was running stainless valves which are probably heavier than what you are going to run. Just something to be aware of and keep an eye on.
lots of people i talked to were biased eiher towards afr or tfs heads, the heads are from tooley and were shipped by TEA so i may have to ask them if they incorporate their hollow valves. I was looking into 2" headers, may go that route once it comes apart. and ceramic coated
Thread Starter
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Guys at tooley said they are solid intake valves. But they are confident valve float will be controlled with the .660 springs