Theta

If you have a manual, throttle blips are a blast with ported TBs and manifolds.

Reminiscent of older red-head Ferrari V8s. I can't help myself under overpasses... I know I'll eventually get in trouble for that.

Ben@WeaponX

Isn't that the truth... I was pulled over after a left turn from a stop for "Improper Start"?! Tires didn't squeal, didn't speed, wasn't changing lanes or driving erratic. I just accelerated too fast/loud and caught the local's attention. He lectured me about it but at a certain point, I was like are you really willing to go into court over this? lol Because I would not be mailing that ticket in.

Theta

Secret weapon: NPP. "Look, officer, it comes like this - quiet and loud. Thanks for the profiled stop" (I said that to the one that said I was 'awfully young to have that car' - ***...).

Do I sound bitter? Been there a few times already...

But, getting off topic.

VERBOTEN

Following...... nice improvements.

JoesC5

I thought that I had read, back when the LT1 info was first released, that it had a smaller diameter TB than the outgoing LS3.

LS3 is 90mm and LT1 is 87mm. I find it hard to believe that the GM engineers didn't know what they were doing when they designed a NEW TB for the LT1 instead of just grabbing a LS3 TB out of the parts bin and throwing it on the LT1.

killascrimp

i have the "test3" set up and that is very disappointing that your dyno showed a 6hp increase i have 93 tune with airaid filter and if your results are in fact true than i think Mike from DS should chime in.... Very hard to believe, not saying you are lying but i had ported TB in the past and thought it was a waist but that was on a hemi engine... Please chime in, is it possible you had heat soaked engine from pulls???? something sounds funny to me.... just hard to believe filter w tune and nothing??

Papas02C5

I have read in another thread that if you do any intake or exhaust mods that you need to get one of Diablo's CMR tuners to upgrade your Diablo Tune (93 Octane) on your Trinity or Intune to take advantage of your mods. I also want to hear what Mike has to say about this one because I am looking into upgrading my intake soon.

Ben@WeaponX

He's referring to the ZR1 LS9 engine and those, like the CTS V/ZL1 all share an 87mm TB. The LT1 is slightly revised but still shares a lot of the main characteristics.

I've done tests like this before, nothing new. I have nothing to gain or lose as I offer all of these products. I was actually looking for 450whp with these, so it was a disappointment to me as well. I emailed the logs to Diablo including the base line, diablo pull, tb pull, and intake pull.

Response was bad gas, but I just feel that's impossible. We did the same pull the week before with a completely separate tank of gas on a similarly cool day and no gains were had. I came back with a new tank of gas Shell V Power 93 to be specific and tried to repeat it after loading in the tune. None of the other pulls had any KR.

Here was the week prior's pulls:
Dyno 1 - baseline
Dyno 2 - Green filter
Dyno 3 - Diablo and Green filter

LT1_E85_Corvette

I'm subscribed! What's the final price after the core swap?

Mike@DiabloSport

Ben, who did you send the logs and tunes to?
Have you tried the 91 tune to see if that helps to get rid of the KR?

Obviously we have quite a few happy customers running these tunes, and I have seen no knock complaints from any of them thus far.

You guys reading this and getting worried....if you have the tune instaled and you are happy, whats to worry about?

Skunkworks

You are correct that LT1 is a smaller TB, LS2, LS3 and LS7 all use a 90mm TB (although the feedback and casting changed a little over the years.

This is the one that they pulled out of parts bin (see below)…



I think the Yukon had it first back in 08, but my 10 Tahoe has it, as does the ZR1. As mentioned it is most commonly found on engines w/DoD or now called AFM.

snakepit

Who makes the green filter you are talking about.

Ben@WeaponX

I emailed them to Johan. Like I said Mike, I've sold your tuners for the V for a long time and that's the reason I grabbed one to play around with on our C7. I never put one on my V because it went big early, but this I was doing some base stuff before we pull the motor next week.

It had 2 diff tanks of gas in it. Two weekends in a row testing with proper cooling before. For whatever reason, the car didn't like the tune. I didn't put the 91 tune in because it had 93 in it. If I get a chance to get it on the rollers before we pull the motor, I will do all three back to back again. It yes a diff tank of gas in it again after heading to the Vette Museum and back.

BarneyZ

The webpage says "*Core Charge* There will be a $249 refundable core charge for the TB is included in the fee". I don't want to quote his prices for him but based on this language I would interpret this to mean 489-249=240. Please correct me if I am wrong.

Ben@WeaponX

Correct, I had to clean up the language as it was a little more confusing before.

Mike@DiabloSport

Fair enough Ben. The 91 tune runs closer to stock timing tables generally, so it's often a good quick test.

Out of curiosity, since we haven't messed with any modified C7s to this point, do you see the AFR lean out with the filter and tb upgrades as airflow increases?

Thanks

drburns

I got my tb today. I couldn't believe how much material there was that could be removed on the stock piece. The install is very simple and for the price, it's a very nice upgrade. It definitely wakes up the throttle response. I'm also running an Air raid filter. If the gains are reproducible, this is the best bang for the buck mod after the core is returned. Now we need a nice affordable smooth intake pipe option that eliminates those baffles/mufflers and the accordion (Hint, hint... Ben) Thanks!

OldJedi

I have a 2012 ZL1 that I have put on a dyno a couple of times. The first time was with a LS3 90mm TB and a RotoFab CAI. It turned 490HP at the rear wheels. 6 months later I ran it with a VMAX ported stock 87 TB and the same RotoFab CAI. It turned 524HP with the ported TB being the only change other than temp and humidity. It certainly convinced me of the value of a ported TB. I will be ordering a 2015 Vette and will have no reservation about putting on a ported TB. There were no codes and an instant seat of the pants feeling of better throttle response.

killascrimp

Cool I am in.... next mod...

RussM05

I did mine this morning. Took about 3.5 hours. A lot of material had to be removed to get rid of the lip. The florescent lamps in my garage causes the gold tint in the photo. Pretty cool picture with just the iPhone, don't you think?

Did not do a before dyno, so I have no before or after results. Sorry. Counting on 2 rwhp gain. LOL