Trickflow 170cc vs 190cc heads - Mustang Evolution

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Old 03-21-2016, 10:08 AM   #1
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Trickflow 170cc vs 190cc heads

Im new to building cars but I'm looking to buy new heads. I've searched high and low for the power differences between the 170cc and the 190 cc R series heads from trick flow. My cars gonna be a weekend steer/strip car. But I'm still looking for the most bang for my buck. I'm getting the trick flow stage 2 cam the the track heat intake and maybe super charging later in the future and really don't wana do the heads twice but don't wana kill the car by getting too big of heads to start out and it's **** until I super charge

Any help?
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Old 03-21-2016, 10:22 AM   #2
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Rest of your combo. "What will do more power" is not a good question for this situation as whatever your bottom end is will dictate what heads you want. If you are just a stock 302 bottom end, get the 170s. Not even a question. If you are a 331 or 347 get the 190s.


Would also recommend a custom ground cam from Ed Curtis at FTI before a TFS2 cam.
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Old 03-21-2016, 10:25 AM   #3
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I have a stock bottom end so I guess I'll go with the 170. I was doing some research on expected power from the set up and all the dyno pulls I've seen are around 310 rwhp so that's about 350 at the crank. Will 24# injectors hold that or should I go with 30#ers?
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Old 03-21-2016, 10:43 AM   #4
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24s should do fine. 170s with a good intake and cam is 310-320 to the wheels with a good tune and a good exhaust.


190s on a stock bottom end would be a complete dog down low. 170s will be good throughout the usable RPM range on a stock bottom end.


For the cam hit up www.flowtechinduction.com


You may also want to consider a different intake if the car will see a lot of street time. The Track Heat does not do great down low. Street heat or my favorite is a GT40/Cobra with a ported lower and stock upper. Tom Moss can take the lower out to flow around 250cfm. That is what the Cobra upper flows and what the 170s top out at. The Cobra also makes terrific low end and is the best looking intake IMO.
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Old 03-21-2016, 10:45 AM   #5
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Awesome. Thanks Scotty.
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Old 03-22-2016, 04:12 PM   #6
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Speak with Ed as he can set you up with a nice little combo if you haven't purchased anything yet. He will also make sure you have the right valve springs and that all the pieces play well with each other. Also make sure you have some LT and free flowing exhaust as well as all the other little things that go with it like a MAF and TB.
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Old 03-22-2016, 10:07 PM   #7
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Also don't forget to measure for correct pushrod length.
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