Tune required with Ported Intake and TB?
Thread Starter
Pro
Joined: Aug 2007
Posts: 696
Likes: 133
From: Central Jersey
Tune required with Ported Intake and TB?
I'm planning to port out my intake manifold and throttle body, most possibly with Cartek. However, I have enough mod funds to just do that. Is it necessary to do a full dyno tune? What I'm asking is, is it safe to run a couple thousand (say 6000) miles without a full dyno tune?
My supporting mods are the Vararam, Bullets exhaust, 160stat and a basic file tune (the TM and spark/timing one) from Cartek.
My supporting mods are the Vararam, Bullets exhaust, 160stat and a basic file tune (the TM and spark/timing one) from Cartek.
Drifting
Joined: Jun 2002
Posts: 1,682
Likes: 3
I'm planning to port out my intake manifold and throttle body, most possibly with Cartek. However, I have enough mod funds to just do that. Is it necessary to do a full dyno tune? What I'm asking is, is it safe to run a couple thousand (say 6000) miles without a full dyno tune?
My supporting mods are the Vararam, Bullets exhaust, 160stat and a basic file tune (the TM and spark/timing one) from Cartek.
My supporting mods are the Vararam, Bullets exhaust, 160stat and a basic file tune (the TM and spark/timing one) from Cartek.
Tech Contributor
Joined: Jul 2002
Posts: 14,950
Likes: 266
From: St. Louis, MO
St. Jude Donor '08
Tune is always recommended. That said I didn't tune after ported intake for a while and it was fine. I'm not a fan of the ported throttle body, I needed to tune after getting it (car was dying) and I don't think it added anything so not worth it to me. Ported intake does add about 10 rwhp and sotp feel, so that is recommended. Ls2portworks.com, CORY, is great to deal with and does good work.
Drifting
Joined: Sep 2005
Posts: 1,371
Likes: 2
From: Gilbert AZ
It really depends, as long as its not putting your car too lean you should be ok. If you have had a tune before then its more likely to be a problem, since your ratios would already be put to the leanest. I would wait, the extra 10hp, probably not worth it if your not tuning the car.
Thread Starter
Pro
Joined: Aug 2007
Posts: 696
Likes: 133
From: Central Jersey
I'm going to call Cartek and ask them, because since i've gotten a file tune from them before, maybe they can just do a complimentary file tune to just make sure things are on the safe side after they do the porting for me.
Tech Contributor
Joined: Jul 2002
Posts: 14,950
Likes: 266
From: St. Louis, MO
St. Jude Donor '08
But I am pretty darn sure that won't happen. A CAI does more to change airflow than the ported intake. A ported tb can change idle tune. But bottom line I didn't tune mine for months with the ported intake without a problem. YRMV.
Tech Contributor
Joined: Mar 2003
Posts: 12,094
Likes: 197
From: Colorado Springs, CO
St. Jude Donor '08-'09-'10-'11
When I got my L76 ported from Cory Harris the scans which were dead on for my tune walked 2-3% positive. That coincides with the reported 10hp or so people get with it. He has it documented with several users. I was pretty surprised at the power difference. It really turned my car's performance around when I at first couldnt get the L92/LS3 heads to wake up.
On a side note, because of the difference in performance from the porting of the stocker, I would be willing to bet that the LS3 FAST will raise the bar quite a bit from current LS power levels. Tuners now seeing 505-515 with these heads will be seeing a 20rwhp jump and a bigger jump in the midband. The L76's keep the flow numbers down from what the heads can do.
I would get the tune at every point in the mod chain (I tune my own car after all changes and even tweak it monthly) but if it were a tighter money situation, it can wait for additional mods to cut donw the costs in the end zone.
On a side note, because of the difference in performance from the porting of the stocker, I would be willing to bet that the LS3 FAST will raise the bar quite a bit from current LS power levels. Tuners now seeing 505-515 with these heads will be seeing a 20rwhp jump and a bigger jump in the midband. The L76's keep the flow numbers down from what the heads can do.
I would get the tune at every point in the mod chain (I tune my own car after all changes and even tweak it monthly) but if it were a tighter money situation, it can wait for additional mods to cut donw the costs in the end zone.
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Joined: Mar 2005
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From: Southampton NJ
I'm planning to port out my intake manifold and throttle body, most possibly with Cartek. However, I have enough mod funds to just do that. Is it necessary to do a full dyno tune? What I'm asking is, is it safe to run a couple thousand (say 6000) miles without a full dyno tune?
My supporting mods are the Vararam, Bullets exhaust, 160stat and a basic file tune (the TM and spark/timing one) from Cartek.
My supporting mods are the Vararam, Bullets exhaust, 160stat and a basic file tune (the TM and spark/timing one) from Cartek.
