HOW MUCH HP CAN YOU MAKE WITH 317 LS HEADS? HERE IS A HINT-THE POWER LIMIT IS NOT FROM FLOW! 

The “magic” of the 317, for me, is most head porters offer a cheaper Stage 1 port job since the 317 already has bigger valves. Local shops wanted 400$ just to refresh the heads. For under 1000$ I got stage 1 porting (313cfm/220cfm @ .600), heads refreshed, a GOOD valve job, and PAC .625 lift springs. The extra 600$ was well spent IMO.

Perfect! Exactly what Info I need currently 🤘

If this video exists to raise the value of 317 then I have stacks of them sitting in my house. Someone please come buy them off of me.

I have a L33 with 317 heads Summit 8720 cam and 7875 turbo. This is going into a 72 Datsun 510

I run ported 317s on an LQ4 with a TVS2300 blower. With California's 91 octane it's a great match.

This is the heads I run on my booster LQ4. Running pump 93 with 8.5psi of boost. So far so good.

Dude ask anyone who ported Ls heads 20 years ago and the 317 was the #2 go to cathedral port. Well at least it was my #2 choice. It’s really nice to see somthing different than just flow bench data in why you should choose this or that head. Good video!

I would love to see you do a video on reverse heads and see the benefits or draw backs to going with this set up.

The price of 317 heads just skyrocketed!

Right on

This was the video I needed lol

Would be neat to see a comparison of what power on pump gas the different factory ls heads support in a turbo situation with realistic coolant temps and detonation detected by knock sensor.

Richard please do a turbo big bang with the Gen 2 LT1! You covered it before but curious what you can do with it.

ok thank you

I'm waiting for you to test the new engine quest head!

Steve Morris always says making power on a turbo motor is easy. Making it live at that power is the hard part. 😂

turbo magnum! turbo magnum! turbo magnum!

Only reason I went with LY6 heads in my setup is because I had to buy a lower profile intake manifold for stuff to fit in my 4th gen firebird. But damn if it doesnt scream up top

LOL the irony of the "turbo cam" T-shirt!

Very glad u did this test- and yes it was what i figured, tripping over these heads on the ground at wreckers- they work perfectly fine for anything but max power

Would love to see sealed long block big bang testing on the 4.8/5.3/6.0!

Wow...

Wait wait wait... #turbocam! every cam is a turbo cam!

Thanks Rich for this video. I have an LQ9 that I set up for E85 (fuel pump, injectors, fuel cell, and lines) I know I am giving up power with the Fab intake but it looks good. In a 2 door Jeep it is definitely a riot to drive. Next step is boost rather than heads, probably the Torq-Storm. Are there any problems with that supercharger that you know of? They are a local company and that is the main reason to support them. 700hp is way more than I would know what to do with. The only reason for the E85 was cost and availability, 30% more fuel and 40% cheaper than premium, plus it smells good 😂! Thanks for all of the great information.

What's your take on throttle body mounted pre turbo 🤔

Hey Richard, would you ever consider testing the limits of the Honda J series v6 engines ?

I'd like to see if it's possible to get "aftermarket head results" with 317 heads and dome pistons. Would it be possible to get even more flow with bigger intake valves and some trimming around the intake valve? Meaning some material removed from the combustion chamber around the intake valve so flow is more so equal all around the intake valve. After some porting to the 317 heads, of course. 317 heads are dirt cheap and using dome pistons may be a cheat code to make the best out of an item that's usually discarded. Also, its mentioned on forums, but I want to make sure. Are 317 and 243/ 799 heads the same except for the difference in combustion chamber size?

I know you shared this for power capabilities but that lm7 build looks like a cheap fun daily build. Probably run ok on 87… what is the compression ratio on the LM7/317 combo?

The 317 has a much slower combustion chamber and this will definitely be a benefit in a pump gas combo.

Any good Head works well with Boost. The Exhaust then becomes the possible obstruction to your combo's Max HP !

Yes, finally. :) If I told you a local hero has a street driven Volvo 244 with a 331CID Lm7 with home ported 862 heads and twin 69mm BW turbos running C16 achieved 163 mph @ 1/4 mile running 100.7% duty on 1230 ccm injectors and AFR 11.8:1 for 183 lb/min airflow. BTR stage 2 TT cam. It has been together for 2 years and he did Street Week Sweden last year. The heads did lift a little bit at 36 psi of boost, but not more than he could carry on with the event to the end. :) Based on fuelflow and airflow we are guestimating about 1550 hp. What do you think? Oh yes, pretty low compression ratio in this one. Otherwise the engine would be broken for sure. ;) ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-VB4uOzEq_F8.html

I have a 1995 C1500 with a small block V8 350/5.7 liter. What cam would you suggest without having to change the spring and so forth. That gives a little bit of chop and improves performance.

Not bad being that this is a monster cam for a 5.3

I’d like to see a big bang on a gen III 6.0 with a PD supercharger. I’m curious how much HP they use and what end difference is compared to a turbo at the crank when one finally lets go.

Hey richard quick question . the vortec 7.4 do you think that intake would be friendly do water meth ? Unless I go all out and make a custom intake i cant intercooler my whipple

So Rich, what do you think the boost limit is with the deck on the 317 head? I guess a better way to ask this question is is what do you think the limit is using these on a street motor?

Oobie doobie! 1482 hp and climbing with a 317 head? It was really good until it wasn't

Okay I have a Question Can I put 6.0 317 heads on a small block 5.7 liter engine?

You talk about junkyard engines you run often. Do you gap the rings in all the ones you boost? Also the higher mileage ones do you typically see significantly bigger gaps with lots of miles? I’ve heard ls engines barely west rings with like 200,000 miles

Waaaaa

Would some ported 317 heads be good for an LSA setup? I have a LQ4 block with flat top pistons and a 222/224 comp cam. Would like some input.

Base engine +- 8.49-1 SCR assuming a .000” deck height. But still made 448hp 398tq 🤔🤔🤔

Would the heads hold on with 1/2 inch head studs ?

ventilated windage tray

have you ever tested a milled or ported 317 heads?

What was the compression ratio on that 6.2

Guess who’s back?! Muhahahaha!!

Would love to see what a stock but fresh LQ9 with a small turbo ,low boost ish towing motor would do. Realistic low to mid rpm range that would make mass quantities between 2 and 4 thousand rpm for passing on hills stuff. Everyday joe towing a 1 car trailer at 70mph in the wind and hills type stuff. One for the working man you know? A boost level for a 100k mile plus longetivity motor...not all of us can afford a diesle