RenoReno2

iTrader: (2)

Has anyone looked into these or bought them and had good luck?

HCI2000SS

iTrader: (2)

No I haven't seen them, but I a have a short block from them that's been nothing but great. I'd be curious to hear more about these heads as well. How much they asking?

RenoReno2

iTrader: (2)

Flow numbers

.100" 78 .100" 57
.200" 138 .200" 106
.300" 204 .300" 140
.400" 259 .400" 166
.500" 288 .500" 185
.600" 306 .600" 194
.650" 310 .650" 197
.700" 313 .700" 200

thompson

iTrader: (4)

Our CNC ported 243 program is still very new, Only about 50 or so sets out there. I hope to see a few customers chime in but in the mean time if we can help you with answering any questions we are here. I look forward to the opportunity to work with you.

Thank you HCI2000SS for the feedback. We always appreciate it.

Thank you,
Kyle
972-853-2450

RenoReno2

iTrader: (2)

From them
We offer the full stage 1 port for $750. This includes the following:
CNC Port intake and exhaust runners
Face intake and exhaust surfaces
True valve cover rail
Surface heads
Cut seats
Grind supplied valves
New cup type or hat type seals
Vacuum check heads
Assembly and disassembly of heads

thunderstruck507

iTrader: (18)

Wow, that is an excellent price for all that. Especially if those flow numbers are even remotely repeatable.

Never heard anything bad about Thompson either, if I were ever in the market for a shortblock they would be top of the list.

thompson

iTrader: (4)

Thanks for the confidence thunderstruck507, If you are ever in need of that short block please give us a call so we can get you set up.

The heads are flowed on a new superflow flow bench, We just paid superflow to verify and re calibrate our machine last month as well prior to releasing the flow numbers. We are very pleased and proud of what we are able to achieve with our heads.

RenoReno2

iTrader: (2)

What was the test bore at?

thompson

iTrader: (4)

I will have to take a look, I think we were testing at 4.030 when we started. They were primarily designed for our 370 and 408.

85LSXTRUCK

iTrader: (2)

Love my thompson motorsport 370 , I wonder how much gain i could expect from theses heads.

HCI2000SS

iTrader: (2)

What HCI are you currently running?

85LSXTRUCK

iTrader: (2)

317/.578 .587 281/284 truck intake.

HCI2000SS

iTrader: (2)

Gotcha. Based on the chart above these 243's flow close to my PRC 5.3 heads. With that said I'd imagine they'd do well on the TMS 370. What I immediately noticed by swapping these heads to the 370 from the LS1 was a broader and more powerful area under the curve

RenoReno2

iTrader: (2)

Just curious, How did you like it on the ls1? how much more of an increase did you see? I'm in the middle of a ls swap now on 88 Monte. The motor is literally brand new and was planning on rolling with the LS1 for awhile and save up for something "bigger and badder" later on

HCI2000SS

iTrader: (2)

It's was fine on the LS1, it moved out really good, but it was just that much better with the 370 due to the broader torque curve