LotusTalk - The Lotus Cars Community - View Single Post - Just finished testing new Intake manifold with great results

Boosted2.0 · 02-04-2009, 11:05 PM

Update: Great news! We did a ton of street testing tonight and got a bunch of important data. For reference when I say Stock ECU I mean Stock Celica ECU, however I have high hopes for the Lotus ECU to behave similarly.

Stock ECU + Stock Injectors + Injen CAI with the DD Manifold and the Q45 TB works great!!! AF was totally safe and there was no sign of detonation. The car also pulled like a raped ape. I expect VERY nice double digit gains versus the stock manifold & TB.

Surprisingly Power FC + Stock Injectors + Injen CAI with the DD Manifold and the Q45 TB also works great. Even though the INjen CAI is smaller, the throttle response is still greatly improved once we dropped the new VVT map on it. It does hit up into the 90s in duty cycle in 3rd gear though, so the 3" CAI will not be a good idea if you want to run the stock injectors - you will need the 440s if you move up to the 3" CAI - this is definitely the limit of the stock injectors.

Unfortunately the 3" CAI and 440cc injectors do not offset eachother for the stock ECU - we kept getting misfire codes on the stock ECU and it just wasn't idling and running well. No big loss though. We were using wide body RC injectors, so its possible that a denso injector may have behaved slightly better.

The power is just fantastic on the stock ECU, and the power with the PowerFC, Injen and the new VVTi map still feels amazing. I'm sure its a bit less than with the 3" CAI, but I don't think its a huge difference untill you get to the very top of the rev range.

We will be back on the dyno this weekend for sure, and we will test the various configurations. We didn't try the stock throttle body tonight because when it got to be 11:30 we called it a night, but we will try it on the dynot (if it will work with the monstrous Q45 TB, it will sure as heck work with the stock one, it will probably just make slightly less power. We will also try to play with our 3" CAI design if we have a chance.

So fantastic news all around - we're planning to try and get dyno time on Saturday and finish the runners and whatnot tomorrow night or Friday night.

And yes - this time I will try to remember to get a sound clip

02-04-2009, 11:05 PM	#30 (permalink)
Boosted2.0 Registered User Join Date: May 2006 Location: Houston, TX Posts: 764	Update: Great news! We did a ton of street testing tonight and got a bunch of important data. For reference when I say Stock ECU I mean Stock Celica ECU, however I have high hopes for the Lotus ECU to behave similarly. Stock ECU + Stock Injectors + Injen CAI with the DD Manifold and the Q45 TB works great!!! AF was totally safe and there was no sign of detonation. The car also pulled like a raped ape. I expect VERY nice double digit gains versus the stock manifold & TB. Surprisingly Power FC + Stock Injectors + Injen CAI with the DD Manifold and the Q45 TB also works great. Even though the INjen CAI is smaller, the throttle response is still greatly improved once we dropped the new VVT map on it. It does hit up into the 90s in duty cycle in 3rd gear though, so the 3" CAI will not be a good idea if you want to run the stock injectors - you will need the 440s if you move up to the 3" CAI - this is definitely the limit of the stock injectors. Unfortunately the 3" CAI and 440cc injectors do not offset eachother for the stock ECU - we kept getting misfire codes on the stock ECU and it just wasn't idling and running well. No big loss though. We were using wide body RC injectors, so its possible that a denso injector may have behaved slightly better. The power is just fantastic on the stock ECU, and the power with the PowerFC, Injen and the new VVTi map still feels amazing. I'm sure its a bit less than with the 3" CAI, but I don't think its a huge difference untill you get to the very top of the rev range. We will be back on the dyno this weekend for sure, and we will test the various configurations. We didn't try the stock throttle body tonight because when it got to be 11:30 we called it a night, but we will try it on the dynot (if it will work with the monstrous Q45 TB, it will sure as heck work with the stock one, it will probably just make slightly less power. We will also try to play with our 3" CAI design if we have a chance. So fantastic news all around - we're planning to try and get dyno time on Saturday and finish the runners and whatnot tomorrow night or Friday night. And yes - this time I will try to remember to get a sound clip