Darth_V8r

iTrader: (4)

Can you verify the throttle is fully opening with the pedal on the floor?

G Atsma

I think it would surprise many how many engines are not getting full throttle due to misadjustment or too thick carpeting on the floor. Ask me how I know lol.

den_hart

Darth, I have no way of verifying if the throttle is opening up all the way. I do know that the accelerator pedal does go all the way to the floor though.

ddnspider

iTrader: (26)

Dang! Well I can say at least the parts were installed right. Mike is good people.

den_hart

Mike didn't install the parts. As mentioned before, all of the parts with the exception of the LS6 intake, LS7 lifters, high pressure power steering line and the 243 heads were installed by Hubbard Racing back in December of 2016. The other parts were installed from a guy that worked at RPM Performance about a month ago. Mike did my base tune back in April of 2016 to smooth my car out and also got me just over a 24HP gain up to 303 at the wheels. That's what's getting me. I've gone from 303 at the wheels to only 357 at the wheels with all of the upgrades!!!

HCI2000SS

iTrader: (2)

Was the 303 hp and 357 hp on the same dyno? Same tuner as well? Sorry if it was posted, I didn't feel like reading through all the pages again lol

den_hart

HCI, yes the 303HP result and the 357HP result was from the same dyno, same location, by Mike Norris and both in the morning hours.

Darth_V8r

iTrader: (4)

Take the air inlet off. Have a friend mash the pedal. See if the blade goes full flat. Say it's only opening 75-80%....

HCI2000SS

iTrader: (2)

Ok gotcha. So a 54 hp gain on the same dyno and same tuner. Well I'm sure the stall ate up a good 10-20 hp on its own. So now your 357 is more like 375. So let's call it a 75 hp gain for all comparative purposes. That seems a tad low but not out of the question.

Darth_V8r

iTrader: (4)

Yeah, and it's something you don't normally think about. You pretty much sssume the pedal on the floor is opening the blade all the way.

den_hart

HCI, I know what you're saying. I just still can't believe that I'm still that far off after everything that has been done to the car. I've heard of other people having a comparable set up, even less than me and they say they make more. The guy who installed all of the upgrades in December is saying that I can put a bigger cam in my car and also get a better flowing catback system to get my to my number.

HCI2000SS

iTrader: (2)

IMO forget the cam that's not the issue here. What catback do you have?

den_hart

HCI, I believe it is the factory catback. I does have a Magnaflow muffler. Those were on the car when I bought it. I had 2 new tail pipes and tips installed. If I end up replacing the catback, I want to keep the deep tone that I have now. I don't want to have the tin can/raspy sound that many cars have today. Mike Norris likes Magnaflow I believe he said. But, he also said that I MAY gain 10HP and the wheels with a different catback. So I'm at a loss here.

HCI2000SS

iTrader: (2)

Yes if its the stock catback but with just a Magnaflow muffler you could probably gain another 10 hp or so with a aftermarket one. The tone should remain very similar if you keep the same muffler. You could also opt for a cutout as well

den_hart

HCI, the guy that did my major upgrades has mentioned a cut out on several occasions and that I'd get 20HP or more from that. But they are not street legal so I may only open them up at car gatherings. He said if I had them and opened them up on a dyno then I'd show more HP which is true but still I couldn't use them on the streets. I'm not sure what a good deep tone catback would be for the Fbodies.

ddnspider

iTrader: (26)

Thats why electric cutouts are you best friend and they're cheap now. Closed when you want and then open to make some noise with the flip of a switch. As for mufflers I've tried quite a few and always like magnaflows. They're more expensive but give you a nice compromise of a relatively mellow idle and then a great time at WOT.

den_hart

Yes electric cutouts are relatively cheap now. I just don't like that I wouldn't be able to drive with them open on the streets without possibly getting pulled over. Seems kind of useless to just use it on a dyno, well and possibly car gatherings too. I've looked at a few Maganflow catback systems and they are kind of expensive.

tech@WS6store

iTrader: (2)

Hci im not really sure you can stack gain like that and the stall "eating" up 10 - 20 hp when possibly locked doesnt seem feasible either honestly.
That may be the one quesriin that wasnt asked besides what gas he was tuning on. 86/7 wont get you near as far as 91/2 and ethanol blends are worse. Best to tune on pure gas and then choose whatever you want after...but i still run pure gas whenever i can get it. Even though it is a tad mlre $$ its worth it in the long run.

den_hart

Tech, I run 92 octane in my car.

tech@WS6store

iTrader: (2)

Fuel quality isnt holding you back then but your fuem inj have got to be pretty close to if not maxed out. Even with such a low number most hci cars will need 36s at least to keep the engine happy.