Dyno tuned

Interested to see what it does on E!

Me too. I should be able to do it thus week I will let ya know

Pavetim said:

Not sure what you mean by fall off. Of course after peak hp and true it falls off that's definition of peak

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Notice how your HP Curve tends to flatten out after rising above torque at 5250 rpm. It simply 'stops rising'. . . .

Again, assuming everything else is okay (might be tune / fuel curve??) this indicates that the mass flow rate / cfm flow rate above 5250 rpm might be lacking.

If the induction system is sufficient and is flowing sufficient air. . .Mass Flow Rate / CFM Flow Rate. Then we look at the Mass Charge. Mass charge is simply the combination of air and fuel. This then falls into the tune category.

These engines are in_flow restricted. But it is not uncommon to find the peak hp, and peak torque number numerical values, about the same. . .

Cheers

Pavetim said:

Well got my mods in and had my 2018 V dyno tuned. Mods are momentum CAI, 2.3" pulley, 87mm throttle.body, ZL1 supercharger instead of the Caddy one, DSX bullet lid. It was a dyno jet and hp I think seemed low but torque was really good 532hp @ 5900rpm, 636lb ft @ 3200 rpm. Now to run gas low so they can do the E85 tune. I am happy how it runs though so far

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I know dynos are dynos and all read differently, but that seems pretty poor,some stock ones make more than that

As far as the "E85" tune, you are aware you cant run straight E85 in the car with a stock fuel system right?

With your mods you wil probably be looking to run like an E40~ blend max...it should pick up very well even on a blend though if the tuner knows what theyre doing.

Well i will see, hope he didn't lock the tune file. Maybe I will buy hp tuners, already have a wide band setup and play with it. I do have some experience tuning but mainly with efilive. I did tell him to do a safe tune because I live in Florida now but with my work I travel.so can be in Florida now and then 8000ft in altitude next month so did want some safety built in. Maybe I can tweak it a little, i always did prefer street tuning Over dyno but at least I am close and the car is safe to run. That was my main worry is getting the car a safe tune so I can at least drive it, I don't race and I hardly ever do wot runs

You have a heat issue up top from running a 2.3 pulley with no additional cooling

Could be a heat issue yes, that dyno run was probably the last one. I do have a zl1 SC with the bigger bricks on it now but I did plan on doing an expansion tank just not sure which one. Don't want to do the interchiller. Didn't want to do the one in the trunk but the V3 doesn't seem to have alot of good options out there and that does seem the best option? I do have a varimax pump I am going to install and the upgraded triple heat exchangers too. Floroda summer is coming so I need to do something with this stuff

Pavetim said:

Could be a heat issue yes, that dyno run was probably the last one. I do have a zl1 SC with the bigger bricks on it now but I did plan on doing an expansion tank just not sure which one. Don't want to do the interchiller. Didn't want to do the one in the trunk but the V3 doesn't seem to have alot of good options out there and that does seem the best option? I do have a varimax pump I am going to install and the upgraded triple heat exchangers too. Floroda summer is coming so I need to do something with this stuff

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Just fyi, the zl1 bricks arent any bigger, theyre just mounted differently.

Do you know what your MATS were during the run? If the system isnt burped and free of air the pump will shut off leaving you with basically no cooling system, which could kill a lot of power up top

I have no idea. I will see if they will let me watch when they do the E85. I wasn't complaining, it runs great was just surprised torque seemed to go up so much and hp didn't. I dont race so prefer torque anyways. I have a small.edelbrock universal expansion tank inwas gonna put that in just so I don't have to worry about air, just not sure how to mount the tank in.

Pavetim said:

Could be a heat issue yes, that dyno run was probably the last one. I do have a zl1 SC with the bigger bricks on it now but I did plan on doing an expansion tank just not sure which one. Don't want to do the interchiller. Didn't want to do the one in the trunk but the V3 doesn't seem to have alot of good options out there and that does seem the best option? I do have a varimax pump I am going to install and the upgraded triple heat exchangers too. Floroda summer is coming so I need to do something with this stuff

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We offer a tank that mounts inside the fender of a V3. Best option short of going trunk

If the issue regarding lack of HP is to much heat, then it would be a good idea to improve the mass flow recovery system, and get that under control before the engine moves into destructive self-detonation.

E85 will also help to cool things down. . . .

Pardon my ignorance but what is mass airflow recovery?

Pavetim said:

Pardon my ignorance but what is mass airflow recovery?

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Everything to do with keeping the engines inlet airflow temperatures cool.

When air is cool, it contains more mass / weighs more.
Also is not as prone to self-detonate.

Before you go crazy, make sure the coolant for the blower is bled properly. I assume it is but its easy enough to do on your own with a dedicated motorsports 3d printed part and a water bottle.

BlackbirdWS6 said:

Before you go crazy, make sure the coolant for the blower is bled properly.

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This is good advice. We have had many LT4 cars come in and need to be bled for a tune, even some that were 100% untouched from the factory.

Lt1z said:

This is good advice. We have had many LT4 cars come in and need to be bled for a tune, even some that were 100% untouched from the factory.

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id say more times than not the LT4/LF4 cars Ive tuned need to be bleed, main issue is the pump will cut off if theres an air pocket, lot of cars down on power a lot because of this. Theres no dumby light and 99% of dealers wont even recognize it as an issue, hell 95% of them seem unaware theres 2 seperate cooling systems on these gen V boosted cars