Ported GT350 intake

[GSLSE20B]

Wouldn't you be tuned anyway? I'm running a custom tune now.

I'd hate to see someone bash a tuner when they have a throttle body that does not follow the the map points because it was ported . The whole desire of the gt 350 throttle body is increased low end response with high rpm flow .

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[09jsw]

I'd hate to see someone bash a tuner when they have a throttle body that does not follow the the map points because it was ported . The whole desire of the gt 350 throttle body is increased low end response with high rpm flow .

I'm not trying to be a dick but that doesn't make sense to me. Anytime you get a part you contact the tuner and see if adjustments are needed.

 

[Performance nut]

I'd hate to see someone bash a tuner when they have a throttle body that does not follow the the map points because it was ported . The whole desire of the gt 350 throttle body is increased low end response with high rpm flow .

I'm not trying to be a dick but that doesn't make sense to me. Anytime you get a part you contact the tuner and see if adjustments are needed.

I'm not really following either. I realize the flow characteristics are different with the porting, not really sure why this is a problem. If your tuner is supplying a can o' tune for you, yeah this may throw it for a loop. But if you paid for a custom tune, sounds like there will either be a long phone call or find a local tuner to do the work for you.

 

[GSLSE20B]

what are people paying for custom tunes now ? is it still 75.00?

 

[09jsw]

what are people paying for custom tunes now ? is it still 75.00?

Mine was 500$ but I picked up 18hp and 30+ tq from email tune

 

[GSLSE20B]

Mine was 500$ but I picked up 18hp and 30+ tq from email tune

Mine is just a chepo 75.00 canned email tune also . Using factory tables . Thats why I don't see the use in paying for dyno tunes

 

[09jsw]

Mine is just a chepo 75.00 canned email tune also . Using factory tables . Thats why I don't see the use in paying for dyno tunes

Who did you pay 75$ for a tune lol! Lund cost me 200$

 

[Terminator2]

Who did you pay 75$ for a tune lol! Lund cost me 200$

Certain updates are $75 I believe after you get your initial tune.

 

[GSLSE20B]

Who did you pay 75$ for a tune lol! Lund cost me 200$

Lund purchased with the Ngauge for the christmas sale 2015 ..

 

[Lonmon]

I have both. Lund tunes I have spent $200 initially, got the free xmas flex upgrade, multiple other free updates for other parts, and then paid $100 I believe for the gt350 update. I spent $650 at Rev Auto getting dyno tuned for both 93 and e85 and gained 4whp and about 10wtq from my Lund tune. I did see some pretty good gains under the curve as well. Only problem is that I am not convinced the gt350tb is worth it since I made no extra power and have some minor starting and drivability issues with it. Worse starting issues with the Lund tune but no noticed drivability once warm. Rev tune has less starting issues but occasional warm stall at idle and cold surge. Both tunes has increased throttle response which is nice. Pretty sure I am going to at least try going back to my stock tb to see if my perfect starting and drivability returns and where power numbers go. I really wish I had it dyno tuned on the stock tb before the gt350tb. I really like Rev Auto's under curve and peak numbers but don't want any stalling or drivability issues. It is too much wait time and pain in the ass to take it back to them repeatedly to get it straightened out. At least with Lund you send in logs and they send you a revision the next day without any hassle.

 

[09jsw]

Certain updates are $75 I believe after you get your initial tune.

Yes like getting a gt350 intake after the initial tune. Lund will still tune for a tb if you ask.

 

[09jsw]

I have both. Lund tunes I have spent $200 initially, got the free xmas flex upgrade, multiple other free updates for other parts, and then paid $100 I believe for the gt350 update. I spent $650 at Rev Auto getting dyno tuned for both 93 and e85 and gained 4whp and about 10wtq from my Lund tune. I did see some pretty good gains under the curve as well. Only problem is that I am not convinced the gt350tb is worth it since I made no extra power and have some minor starting and drivability issues with it. Worse starting issues with the Lund tune but no noticed drivability once warm. Rev tune has less starting issues but occasional warm stall at idle and cold surge. Both tunes has increased throttle response which is nice. Pretty sure I am going to at least try going back to my stock tb to see if my perfect starting and drivability returns and where power numbers go. I really wish I had it dyno tuned on the stock tb before the gt350tb. I really like Rev Auto's under curve and peak numbers but don't want any stalling or drivability issues. It is too much wait time and pain in the ass to take it back to them repeatedly to get it straightened out. At least with Lund you send in logs and they send you a revision the next day without any hassle.

If you have an issue email Rev some logs, they have no problem looking them over. You paid for a tune and they will make it right.

 

[4V Mayhem]

Mine are free, lol!!

 

[Terminator2]

I have both. Lund tunes I have spent $200 initially, got the free xmas flex upgrade, multiple other free updates for other parts, and then paid $100 I believe for the gt350 update. I spent $650 at Rev Auto getting dyno tuned for both 93 and e85 and gained 4whp and about 10wtq from my Lund tune. I did see some pretty good gains under the curve as well. Only problem is that I am not convinced the gt350tb is worth it since I made no extra power and have some minor starting and drivability issues with it. Worse starting issues with the Lund tune but no noticed drivability once warm. Rev tune has less starting issues but occasional warm stall at idle and cold surge. Both tunes has increased throttle response which is nice. Pretty sure I am going to at least try going back to my stock tb to see if my perfect starting and drivability returns and where power numbers go. I really wish I had it dyno tuned on the stock tb before the gt350tb. I really like Rev Auto's under curve and peak numbers but don't want any stalling or drivability issues. It is too much wait time and pain in the ass to take it back to them repeatedly to get it straightened out. At least with Lund you send in logs and they send you a revision the next day without any hassle.

Are you on stock injector on E-85? I'm putting LU47s in mine ASAP and I'm on the stock manifold.

 

[Performance nut]

Back on topic (rascally thread pirates):threadjacked:

Is there a way to definitely tell if porting is worth it? From an engineering perspective, if someone supplied a before and after flow curve, would someone be able to translate that into a difference on a tune (ie, since this part changed, I would make this adjustment compensate/take advantage of that change).

• At some point, I would think you would say "that's it, we crammed as much air as we possibly can into the otherwise stock NA engine as we are going to get" in which case more flow is irrelevant, now it is all about flow velocity I would think.
• Unless you now put a different camshaft in the car in which case you may need the extra volume of air if the engine is keeping the valves open longer or if they are opening further.
• If you are going forced induction, I would think any increase in flow is going to translate to power... that is until you reach the limit of what your power adder can cram into the engine.

Am I off base on this here? Engine builders and tuners out there?

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