Sc14 to buick and e85

[delcowizzid]

E85 goes right past detonation and preignites before you will hear it rattle

[TdracerTd]

Intake temps with the sc14 before the cooler went on we're in excess of 150c and dropped below 45c after. I lnow the m90 is more efficient, but I would still think iats would be up there. Surely running a cooler can't hurt?

[Holden202T]

yes but the question is, and I would love to know the answer .... intake temps might be 150c before the inkector, but then what does the intake charge drop to after the injectors spray the alcohol!

ever seen a carby motor on methanol, the inlet manifold is usually pretty icey after idling for a while!

im not suggesting the top of the pistons are going to be icey but surely if it can do that to the inlet manifold it has to at least partially cool the inake charge!

[TdracerTd]

If the air in the manifold pre injector is 45c as opposed to 150c + then you have more air in the manifold? Wouldn't that help VE?

What I mean is, E85 may protect against Knock because it lowers cylinder temps, but a lower temp intake charge should improve VE and thus horsepower, right?

[Dylan]

With a lower charge temp your ve stays the same that's where the inverse charge temp comes into play.
Depending on the calculated charge temp theres a extended pulse width to allow for warmer or colder air.

[krusty]

thats where a dyno is handy to get mbt

Yeah I know;). I only dyno tune and street tune is for lean cruise only pretty much

[krusty]

Intake temps with the sc14 before the cooler went on we're in excess of 150c and dropped below 45c after. I lnow the m90 is more efficient, but I would still think iats would be up there. Surely running a cooler can't hurt?

I reckon the M90 may not be the answer for what you need. You've got the SC14 so primed and on at the sniff of the throttle that the parasitic loss of an M90 may not be what the car needs for track. but yeah, for sure it will need to be cooled if you use one to keep the same response of the much much lighter SC14.

I'm actually interested to see which way you go tbh

[v6bucket]

I help with a V6 Dato 1200 fitted with an SC14 running Methanol, it also has another injector on the intake side of the blower, that was switched at about 3/4 throttle(this has now changed to run with the rest of the injectors). I've had a look at a couple of logs from a couple of years ago, the inlet temps would lift to 95°c whilst in stage then drop to 60°c by the end of the 1/8th mile, with MAP readings of 170kpa, so these figures should be lower now that the extra injector is running all the time.

[TdracerTd]

With a lower charge temp your ve stays the same that's where the inverse charge temp comes into play.
Depending on the calculated charge temp theres a extended pulse width to allow for warmer or colder air.

Doesn't calculated charge temp take into account the mat reading?

[Dylan]

Charge temp is a calculation between mat and coolant temp.
There's a table to alter the calculation called. Percent coolant contribution.

The higher the percentage the more influence the coolant temp has.