TFS 235cc Head results
01-30-2008 | 01:23 PM
#1
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From: Bridgewater,Ma
TFS 235cc Head results The test made a few chages but still shows how the heads shined.
Car is a Z28 wetsleeve 427ci,M6 with a D1 Procharger (10lbs)
Before #'s are ported 241 heads by a well known porter (2.10/1.60 valves) 60 cc combustion chambers and a Crane 230/240 .6xx lift duration Cam.
After is the TFS 235cc heads with 70cc combustion chambers and a 228/234 Cam.
Only the H/C was changed with the tune.Keep in mind with the TFS we dropped alot of compression too but it still had a great gain.
Car is a Z28 wetsleeve 427ci,M6 with a D1 Procharger (10lbs)
Before #'s are ported 241 heads by a well known porter (2.10/1.60 valves) 60 cc combustion chambers and a Crane 230/240 .6xx lift duration Cam.
After is the TFS 235cc heads with 70cc combustion chambers and a 228/234 Cam.
Only the H/C was changed with the tune.Keep in mind with the TFS we dropped alot of compression too but it still had a great gain.
01-30-2008 | 01:40 PM
#3
The test made a few chages but still shows how the heads shined.
Car is a Z28 wetsleeve 427ci,M6 with a D1 Procharger (10lbs)
Before #'s are ported 241 heads by a well known porter (2.10/1.60 valves) 60 cc combustion chambers and a Crane 230/240 .6xx lift duration Cam.
After is the TFS 235cc heads with 70cc combustion chambers and a 228/234 Cam.
Only the H/C was changed with the tune.Keep in mind with the TFS we dropped alot of compression too but it still had a great gain.
Car is a Z28 wetsleeve 427ci,M6 with a D1 Procharger (10lbs)
Before #'s are ported 241 heads by a well known porter (2.10/1.60 valves) 60 cc combustion chambers and a Crane 230/240 .6xx lift duration Cam.
After is the TFS 235cc heads with 70cc combustion chambers and a 228/234 Cam.
Only the H/C was changed with the tune.Keep in mind with the TFS we dropped alot of compression too but it still had a great gain.
Smaller cam, less compression, and more power. Can't argue with that. Nice results, congrats.
01-30-2008 | 03:50 PM
#5
so I take it this was the same boost level? Or maybe you actually lost boost since the heads flow more? I take it the same pulleys were used. Nice gain!
Last edited by 52172; 01-30-2008 at 05:04 PM.
01-30-2008 | 04:03 PM
#7
Great results Don (as usual). You basically can have your cake and eat it with that combo. Well done. 
__________________
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
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01-30-2008 | 05:30 PM
#9
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From: Bridgewater,Ma
The only thing changed was the H/C.Blower pulley size was the same.I'd say boost stayed at the 10-11lbs at peak. The car drives like stock with 16inches of vacuum at 850rpm idle. The customer just wanted a dead reliable,stock driving car with power.The car has Cats and a 3" Magnaflow exhaust too.True duals would push alot more power but we like the quiet car.
The old heads are for sale for $800.
The old heads are for sale for $800.
01-31-2008 | 09:30 AM
#12
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From: Bridgewater,Ma
Here is probly what the graph would look like with a free flowing exhaust.This setup is extremely close with timing up top pulled to 12 degree's (for the owners sake) but the same boost levels and free flowing exhaust.
01-31-2008 | 09:33 AM
#13
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From: Bridgewater,Ma
If these heads were milled to raise compression and alittle bigger Cam we probly would of made 60-100rwhp more.
02-01-2008 | 05:25 PM
#17
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From: Bridgewater,Ma
The customer should be picking it up next week. For the record he hasn't driven the car in almost 4 years.The shop that originally did the work really screwed up the car to the point it would break down every 40 miles. We redid alot of stuff like all wiring under the hood to get it dead reliable.I'm sure he's going to love it now.
