Yowwwwzaa
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Joined: Jul 2001
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From: A thorn in a few people's sides
Engine: 2 mice and a cat
Yowwwwzaa
I must say that is not too bad for only an afternoon of tuning.
As some of you might recall, member Itjojo, spend an afternoon together tuning his new setup. The setup consisted of:
SCed 355CI low compression/SR intake/AFR190/24# SVO injectors/hooker long tubes/with stock exhaust after the headers/stock 165 ECM with modded ARAP bin/sporting a MAF/running pump gas/in a full weight vette ~3350#
We spend the better part of an afternoon together with my explaining the ins and outs of the tables/parameter. Jojo had plans to get into chip burning, but wanted to get a head start on the car and see what it would do at the track before winter hit. After all the hard, good work he did, I can't hardly blame him for being anxious.
This past weekend Jojo set out with a few of his buddies to track test the new setup. I planned on attending and tweaking if necessary the tune, but upon him leaving my place, I knew he was in good shape, and complications, with Corkvette traveling that far, kept me from being there in person.
With the tune, I knew Jojo would be at a pretty big disadvantage at the track with the power he was making and the tires not to mention the fragile dana 36 rear. So I tuned his spark table in the same fashion as I did my stock 350 setup also sporting the same rear, and stock wheels. From the way Jojo decribed it, the car was hookin great, just as planned. It was pulling consistant low 1.7 60' times, which we all know it could have easily burned the tires off it, if left to an aggressive spark advance. When we first started out on the timing on the street the car would break them easily loose at 30 mph. So with some of the tweaks and the better traction a strip offers it seems to have worked out well.
Jojo said the car ran awesome and I would have to agree. Even with the easy startouts, it turned 12.00@119MPH!!!! We all know with that MPH in that weight car that is about 11.2-.3 or maybe even quicker! I told jojo when he left my place that day he had an easy low 11s car, but he did not believe it till he hit the strip last weekend.
I told him if he gets some slicks with some lightweight wheels, and skinnies on that car, he can come back up with his new stuff he got and we can tune the lower part of the spark table to a more aggressive model, and he will be pulling the front off the ground just like Corkvette and I are. That will obviously reduce his ETs, and with the weight reduction, probably pull him into the 120 MPH area!
If that is not enough, he is still running the measely stock exhaust system, with just the addition of the headers. My car with an aftermarket 3" exhaust gained 3mph over an already upgraded from stock 2 1/2 inch! So can you say 10s most likely!
Then the real kicker. Upon going over his setup here at the house,,,I noticed that when he was going full throttle the TB was not fully opening that day we were tuning it. This is a VERY common problem with SR vettes I was aware hence the reason I checked it. I had to make a spacer for the TB cable linkage on mine to take up the slop, and allow the gas peddle to fully open the TB. I looked through all my old stuff and could not find a piece that was the right length for Jojo, but got one that was pretty close. Yet his throttle still did not go 100% full. So after he give me the report of the car,,,,,I jokingly asked, you did fix the TB right? He replied I thought you did! So he wasn't even full thottle that day! lol.
I would say that Jojo has a pretty good jump start on his tuning and can rest easy going into the long winter knowing he is on line to run very low 11 or 10s most likely next season.
As much as I would like to take credit for the entire success of the setup, Jojo did a great job of fabricating many of the items he needed for the SC setup and also on listening to me the previous spring on what components would be work in a setup like that. We only met that one afternoon early in the spring and he followed through with exactly what I mentioned to him that day, and he is now reeping the benfits of it.
You will have to start coming to the strip with Corkvette, Jim, Dad and I next year....we will be the ugly 5 rolling into the strip next year in full trim...coming to play with the big boys with their gutted out cars.
Good Job Jojo! :hail:
Next year should be VERY interesting!
As some of you might recall, member Itjojo, spend an afternoon together tuning his new setup. The setup consisted of:
SCed 355CI low compression/SR intake/AFR190/24# SVO injectors/hooker long tubes/with stock exhaust after the headers/stock 165 ECM with modded ARAP bin/sporting a MAF/running pump gas/in a full weight vette ~3350#
We spend the better part of an afternoon together with my explaining the ins and outs of the tables/parameter. Jojo had plans to get into chip burning, but wanted to get a head start on the car and see what it would do at the track before winter hit. After all the hard, good work he did, I can't hardly blame him for being anxious.
This past weekend Jojo set out with a few of his buddies to track test the new setup. I planned on attending and tweaking if necessary the tune, but upon him leaving my place, I knew he was in good shape, and complications, with Corkvette traveling that far, kept me from being there in person.
With the tune, I knew Jojo would be at a pretty big disadvantage at the track with the power he was making and the tires not to mention the fragile dana 36 rear. So I tuned his spark table in the same fashion as I did my stock 350 setup also sporting the same rear, and stock wheels. From the way Jojo decribed it, the car was hookin great, just as planned. It was pulling consistant low 1.7 60' times, which we all know it could have easily burned the tires off it, if left to an aggressive spark advance. When we first started out on the timing on the street the car would break them easily loose at 30 mph. So with some of the tweaks and the better traction a strip offers it seems to have worked out well.
Jojo said the car ran awesome and I would have to agree. Even with the easy startouts, it turned 12.00@119MPH!!!! We all know with that MPH in that weight car that is about 11.2-.3 or maybe even quicker! I told jojo when he left my place that day he had an easy low 11s car, but he did not believe it till he hit the strip last weekend.
I told him if he gets some slicks with some lightweight wheels, and skinnies on that car, he can come back up with his new stuff he got and we can tune the lower part of the spark table to a more aggressive model, and he will be pulling the front off the ground just like Corkvette and I are. That will obviously reduce his ETs, and with the weight reduction, probably pull him into the 120 MPH area!
If that is not enough, he is still running the measely stock exhaust system, with just the addition of the headers. My car with an aftermarket 3" exhaust gained 3mph over an already upgraded from stock 2 1/2 inch! So can you say 10s most likely!
Then the real kicker. Upon going over his setup here at the house,,,I noticed that when he was going full throttle the TB was not fully opening that day we were tuning it. This is a VERY common problem with SR vettes I was aware hence the reason I checked it. I had to make a spacer for the TB cable linkage on mine to take up the slop, and allow the gas peddle to fully open the TB. I looked through all my old stuff and could not find a piece that was the right length for Jojo, but got one that was pretty close. Yet his throttle still did not go 100% full. So after he give me the report of the car,,,,,I jokingly asked, you did fix the TB right? He replied I thought you did! So he wasn't even full thottle that day! lol.
I would say that Jojo has a pretty good jump start on his tuning and can rest easy going into the long winter knowing he is on line to run very low 11 or 10s most likely next season.
As much as I would like to take credit for the entire success of the setup, Jojo did a great job of fabricating many of the items he needed for the SC setup and also on listening to me the previous spring on what components would be work in a setup like that. We only met that one afternoon early in the spring and he followed through with exactly what I mentioned to him that day, and he is now reeping the benfits of it.
You will have to start coming to the strip with Corkvette, Jim, Dad and I next year....we will be the ugly 5 rolling into the strip next year in full trim...coming to play with the big boys with their gutted out cars.
Good Job Jojo! :hail:
Next year should be VERY interesting! 
Member
Joined: Mar 2002
Posts: 277
Likes: 1
From: Boston, MA
Car: Corvettes
Engine: Modified L98 & LT5
Transmission: DN 4+3 & ZF6
Axle/Gears: 3.07 & 4.10
Jesse.... wondering how is he getting enough fuel into the car with those injectors and a supercharger? What fuel pump? My OEM pump can't feed my 350 enough with 24# SVOs even with the FP cranked upwards of 52psi. Even with the injectors going static it feels like it leans out. 
Just curious.
Just curious.
Thread Starter
Banned
Joined: Jul 2001
Posts: 820
Likes: 0
From: A thorn in a few people's sides
Engine: 2 mice and a cat
Scorp,
My stock pump at 45psi was able to supply enough to my 406 and run it at 11.14@123. It was just a touch over 90% duty cycle, and with the walbro its down way more now.
As for his, when he left my place, I told him to not shift it any higher than 5500 RPM, and testing to those RPMS, it was at about 75-80% duty cycle.
I have posted many things on here and also on the vette forum, about injector size...
If your having problems with your 350, then something other than the injectors are the problem. As I said they work perfectly fine on my 350/406, and Corky just hit 10.92@124 with his. He runs a redicilously low 36-37psi on his...so They are actually smaller looking than 24# at that PSI.
This majic 80% duty cycle cutoff is a bunch of BS....people forget all they have to do is crank up the FP a little and readjust to lower the DC. But they will get 36# injectors and turn it way down to compensate...somehow I find that VERY odd.
Hooked-up who I am tuning his car again this weekend, ran his 415CI motor, Miniram, great flowin heads, with 30# injectors...complaining to me last night he is too rich....his best ET is 10.2@131 MPH....I find it very tough to swallow when people with 350s and 383s express the need to run HUGE injectors.
Also scorp your still running stock heads aren't you? Or do you have AFRs.....If you have the stock flowin heads, there is no way that you need larger than 24# injectors.
Well I have to leave to PSU....heading down to tip some beer and attend the slaughter tomorrow.
Later..
My stock pump at 45psi was able to supply enough to my 406 and run it at 11.14@123. It was just a touch over 90% duty cycle, and with the walbro its down way more now.
As for his, when he left my place, I told him to not shift it any higher than 5500 RPM, and testing to those RPMS, it was at about 75-80% duty cycle.
I have posted many things on here and also on the vette forum, about injector size...
If your having problems with your 350, then something other than the injectors are the problem. As I said they work perfectly fine on my 350/406, and Corky just hit 10.92@124 with his. He runs a redicilously low 36-37psi on his...so They are actually smaller looking than 24# at that PSI.
This majic 80% duty cycle cutoff is a bunch of BS....people forget all they have to do is crank up the FP a little and readjust to lower the DC. But they will get 36# injectors and turn it way down to compensate...somehow I find that VERY odd.
Hooked-up who I am tuning his car again this weekend, ran his 415CI motor, Miniram, great flowin heads, with 30# injectors...complaining to me last night he is too rich....his best ET is 10.2@131 MPH....I find it very tough to swallow when people with 350s and 383s express the need to run HUGE injectors.
Also scorp your still running stock heads aren't you? Or do you have AFRs.....If you have the stock flowin heads, there is no way that you need larger than 24# injectors.
Well I have to leave to PSU....heading down to tip some beer and attend the slaughter tomorrow.
Later..
Member
Joined: Jul 1999
Posts: 188
Likes: 0
From: Boston , MA
Car: 89 Iroc-Z
Engine: 355
Transmission: 700R4
Hey ski, I have a similiar set up as jojo and was wondering if you had a copy of the bin that I could take a look at. If not what needed the most change - fuel of spark tables? How much boost was he seeing and what type of charger does he have? Thanks for any info.
Senior Member
Joined: Apr 2003
Posts: 552
Likes: 0
From: Annapolis MD
Car: 87 Vette 85 TA 82 Z/28
Engine: 3 - 350's 388 400
Transmission: 2-700R4's 1 T56 Setup!
Axle/Gears: 2.59's 3.42's 3.73's
i'm curious how the D36 is going to hold up. what gears does he have? 3.07's or 2.59's? next spring i'm hoping to be running 12.0's or so N/A low low 11's on juice
Senior Member
Joined: Nov 2000
Posts: 812
Likes: 0
From: Indpls IN US
Car: 91 Z28
Engine: Forged 383
Transmission: Pro-built 700R4
Who the heck is Jojo?? Is he from the vetteforum or here? Either way he's got an awesome setup. One thing I'd like to know about the car is what cam is he running with that SC?
Ski, about the injectors, I know my car has 36lbers in it (too much). The guy I got it from wondered why TPIS could never get it to stop running rich up top after several reburns. I guess if a 415ci engine similar to mine, not counting cubes, is too rich with 30# injs. that my engine will forever be rich with 36# injs.
What heads does that 415ci vette have, anyway?
Ski, about the injectors, I know my car has 36lbers in it (too much). The guy I got it from wondered why TPIS could never get it to stop running rich up top after several reburns. I guess if a 415ci engine similar to mine, not counting cubes, is too rich with 30# injs. that my engine will forever be rich with 36# injs.
What heads does that 415ci vette have, anyway?