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Old 05-12-2015, 01:03 PM   #6329
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I have the Sprintex intercooled system (Delicious 8.83 tune on 94 octanefuel with 69mm pulley, full header back exhaust) and I am also having issueswith low RPM WOT hesitation. If I go WOT in 1st, 2nd or 3rd gears below3,000 RPM the car bogs/hesitates, sometimes a coupleof times then takes off. If I only go WOT north of 3,000 RPM it seems ok. Alsoit is worst when cold. I took off the SC elbow recently and replaced theplastic fittings with brass and used a good thread sealant. It felt slightlybetter but still hesitates/surges going to WOT @ low RPM. I also had the enginesmoke tested with no leaks detected. I am not sure what to do next and anyadvice would be helpful. From what I am reading some have this problem andother don't. Not sure if it could be fuel related. Are there any Ecutek toolsto help diagnose these issues? Has anyone else solved this problem and if so, how? Isthis just the way it drives (do I have to always be at 3,000 RPM + before goingWOT?
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Old 05-12-2015, 01:17 PM   #6330
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I have the Sprintex intercooled system (Delicious 8.83 tune on 94 octanefuel with 69mm pulley, full header back exhaust) and I am also having issueswith low RPM WOT hesitation. If I go WOT in 1st, 2nd or 3rd gears below3,000 RPM the car bogs/hesitates, sometimes a coupleof times then takes off. If I only go WOT north of 3,000 RPM it seems ok. Alsoit is worst when cold. I took off the SC elbow recently and replaced theplastic fittings with brass and used a good thread sealant. It felt slightlybetter but still hesitates/surges going to WOT @ low RPM. I also had the enginesmoke tested with no leaks detected. I am not sure what to do next and anyadvice would be helpful. From what I am reading some have this problem andother don't. Not sure if it could be fuel related. Are there any Ecutek toolsto help diagnose these issues? Has anyone else solved this problem and if so, how? Isthis just the way it drives (do I have to always be at 3,000 RPM + before goingWOT?
Speak to your tuner.
As for tune related tools, yeah that's what logging is for.
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Old 05-12-2015, 02:00 PM   #6331
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I have the Sprintex intercooled system (Delicious 8.83 tune on 94 octanefuel with 69mm pulley, full header back exhaust) and I am also having issueswith low RPM WOT hesitation. If I go WOT in 1st, 2nd or 3rd gears below3,000 RPM the car bogs/hesitates, sometimes a coupleof times then takes off. If I only go WOT north of 3,000 RPM it seems ok. Alsoit is worst when cold. I took off the SC elbow recently and replaced theplastic fittings with brass and used a good thread sealant. It felt slightlybetter but still hesitates/surges going to WOT @ low RPM. I also had the enginesmoke tested with no leaks detected. I am not sure what to do next and anyadvice would be helpful. From what I am reading some have this problem andother don't. Not sure if it could be fuel related. Are there any Ecutek toolsto help diagnose these issues? Has anyone else solved this problem and if so, how? Isthis just the way it drives (do I have to always be at 3,000 RPM + before goingWOT?

I had this exact same problem until I switched to moto-mikes tune. With delicious tune 8.83 while cold, the car is basically undrivable unless you just WOT everywhere. Once warmed up it still has a huge dead spot in the pedal, and by dead spot I mean: you push the gas to accelerate at a moderate pace and it just doesn't go until you mash the gas. With moto-mikes tune, when I press the gas the car just goes. Is there still some hesitating with mikes tune? Yes, but at least it doesn't feel like the engine is trying to escape, and it goes away very quickly.

I was very hesitant to spend more money on another tune but in the end I'm glad I did. The car runs much better and instead of 19.4 average MPG I get around 22 in town.

I'm in no way trying to bash vendors, but with each new delicious revision, it just gets worse for me. BTW I also have no vacuum leaks of any kind. If you want your innovate kit to run like a stock car I'd suggest @moto-mike. He's definitely ahead of the game.

Cheers.
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Old 05-12-2015, 02:08 PM   #6332
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I concur with @CK_Bladesmith . I have replaced the plastic nipple with brass and moto-east's latest tune seems to be working well. Haven't had the issue yet. (Haven't driven much either though). @moto-mike I will send the logs next time I take the car out. Sorry for the delay
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Old 05-12-2015, 05:23 PM   #6333
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Is everything with the 3k hesitation issue (I now have it) running E85? Also, have you found that a quick rev to 5k clears it up?
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Old 05-12-2015, 05:27 PM   #6334
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I'm running 93oct
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Old 05-12-2015, 05:27 PM   #6335
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Is everything with the 3k hesitation issue (I now have it) running E85? Also, have you found that a quick rev to 5k clears it up?

93 octane here. Only thing that clears it up on bills tune is getting the oil temp above 150ish. After that the first 30% of pedal travel is still sluggish.
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Old 05-12-2015, 06:09 PM   #6336
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So by using the Moto Mike tune there is minimal bucking/hesitation when going wot at under 3k rpm? Currently I have significant bucking/surging in 1st to 3rd gears unless I go wot constantly which I don't want to do. Not sure what is meant by dead pedal feel. Also wondering if a cold air intake wll help the situation. Is there basically a min rpm where we can go wot and an rpm level where there will be surging?
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Old 05-12-2015, 06:16 PM   #6337
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My issue, on the Moto-East tune, only happens at 2.7-3.0K RPMs. Partial to full throttle, like there's a fuel delivery issue. There's a sputter for a second or two, but a quick press of the pedal to 5k with the clutch in makes it go away. Happens very infrequently. I'm going back to 91 octane today and was hoping it was some bad corn, but with others having similar problems, the next fix will be to change out the rear fittings with brass. @moto-mike do you have some input on this?
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Old 05-12-2015, 06:23 PM   #6338
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So by using the Moto Mike tune there is minimal bucking/hesitation when going wot at under 3k rpm? Currently I have significant bucking/surging in 1st to 3rd gears unless I go wot constantly which I don't want to do. Not sure what is meant by dead pedal feel. Also wondering if a cold air intake wll help the situation. Is there basically a min rpm where we can go wot and an rpm level where there will be surging?

As a personal rule of thumb, I NEVER go WOT under 3k rpms. The rods in these cars are a weak point, and even though these superchargers don't put out a ton of power, they still add stress to a stock component. Bills tune under 3k rpms, when the car is cold, bucks like crazy. Mikes tune, under 3k rpms only slightly does under the same amount of throttle application. By dead pedal feel I mean that when you push on the gas the car doesn't go. The throttle on mikes tune is very linear and the amount that you put your foot down, is the amount it goes. Bills tune is more like an on and off switch, which for my personal preference, it's undesirable.
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Old 05-12-2015, 06:27 PM   #6339
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My issue, on the Moto-East tune, only happens at 2.7-3.0K RPMs. Partial to full throttle, like there's a fuel delivery issue. There's a sputter for a second or two, but a quick press of the pedal to 5k with the clutch in makes it go away. Happens very infrequently. I'm going back to 91 octane today and was hoping it was some bad corn, but with others having similar problems, the next fix will be to change out the rear fittings with brass. @moto-mike do you have some input on this?

Mike and I have talked about this and it seems to be somehow related to the direct injectors. Maybe he can chime in. All I know it's that his tune only barely does it for me. Once the oil temp rises above 100f, it's basically good to go.
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Old 05-12-2015, 06:28 PM   #6340
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Originally Posted by cshearer View Post
I have the Sprintex intercooled system (Delicious 8.83 tune on 94 octanefuel with 69mm pulley, full header back exhaust) and I am also having issueswith low RPM WOT hesitation. If I go WOT in 1st, 2nd or 3rd gears below3,000 RPM the car bogs/hesitates, sometimes a coupleof times then takes off. If I only go WOT north of 3,000 RPM it seems ok. Alsoit is worst when cold. I took off the SC elbow recently and replaced theplastic fittings with brass and used a good thread sealant. It felt slightlybetter but still hesitates/surges going to WOT @ low RPM. I also had the enginesmoke tested with no leaks detected. I am not sure what to do next and anyadvice would be helpful. From what I am reading some have this problem andother don't. Not sure if it could be fuel related. Are there any Ecutek toolsto help diagnose these issues? Has anyone else solved this problem and if so, how? Isthis just the way it drives (do I have to always be at 3,000 RPM + before goingWOT?
Well there seems to be something going on if there is hesitation down low. I drive the 8.83 tune on my car every day, with 91 octane or E85 and never experience this issue. We also have quite a few people locally who do not have issue including our local SCCA National Autocross Competitor, who drives his car daily on 91 and E85 with our 69mm pulley. His vehicle is an automatic and drives well below 3000 RPM's a lot of the time.

Now I do have a completely stock exhaust system and stock intake or AirAid intake in the car when testing. So there maybe something related to changing parts with our tune that is not ideal. We have seen some exhaust systems cause more back pressure then stock in certain scenarios and this can cause hesitations in the power band, especially down low. Might be something to look at.

On the version 8.83 tune we have had a lot of people respond stating it was a great improvement over the 8.65 tune, especially down low. Maybe some of the Sprintex kits are built a little differently from others, causing the tunes to not work perfectly on these kits? Maybe different parts on the cars are causing the differences?

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Old 05-12-2015, 06:31 PM   #6341
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Mike and I have talked about this and it seems to be somehow related to the direct injectors. Maybe he can chime in. All I know it's that his tune only barely does it for me. Once the oil temp rises above 100f, it's basically good to go.
I thought I recalled that too, which port injection taking over at 3K RPMs. But I don't know much about how the direct/port injection system works, or how Mike tunes for it.
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Old 05-12-2015, 06:33 PM   #6342
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8.83 fixed the issue where the engine would bog down (rpms drop dramatically) when taking off normally (daily driving). The rpms would dip real low when releasing the clutch pedal and giving it gas (normal take off from stop).

The issue with the bucking remains for me. It does it between 2k and 3k like others have said. I'm using stock everything. Flex fuel kit from DT but using 93 oct right now. Stage 2 sprintex with pulley that came with intercooler upgrade (75 I think)
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