EFR 6258 & built motor
 

The numbers were a lot lower than expected.
This Dyno is known to have low numbers but this is just about 10 rwhp more than my ported mp62.
Was told ca91 was my limiting factor and reason I can’t go over 14 psi.
Motor can take it but started to hear detonation.

https://cimg6.ibsrv.net/gimg/www.mia...5719a00202.png

Sounds about what you should expect on 91, timing advance must be limited as well.

yeah I would bet that 91 is your limiting factor now; e85 available around you? It is really hard to find around here in NY, CA is usually worse off than us... I know some other members have had success tossing in a Lucas octane booster (or similar) with each tank... not sceintifically precicse or necessarily repeatable but will certainly net you some gains. I ran into 93 limits with my 6758 at around 300whp, not inconceivable to think that lower octane and heartbreaker dyno would be around 250whp

E85 I was told is not regulated and sometimes can be as low as e60. So are my only options either e85 or meth injection? I keep seeing ppl hit about 300hp w this turbo.
Really not too fond of e85 because then I’ll have to carry them in jugs to the track. Since they don’t sell it there and not too many stations have it near by as well.

Don't have more info on your build, but MS3x can handle flex which blends tables dependent on e85 percentage (senses it and does it automatically) but I understand reservations about e85. Sure meth injection could help, and so could race gas. Hitting 300 on that turbo is, as you mentioned, subject to the dyno you're on; totally possible theoretically, but youre working with 91 octane and a small 4 cyl. What compression ratio are you running, how are your intake temps and what kind of intercooler are you running -- there are a lot of factors involved, but without upping your octane you are a long way from 300 showing up on that dyno.

I deliver bad news all day in my job, why should here be any different

Just give it to me straight Doc. LOL

Running 9:1 pistons, carillo h beam rods, square top, kraken top mount with 3" exhaust and intercooler. BP4W head from East Street Racing. 268 cam, dual springs, SUB.
Might be missing something but thats the bulk of it.

The good news about E85 is that even at E60 it has all the det resistance you'll need. I think the actual number from that viewpoint is somewhere around E40. Flex fuel would have you sorted out. Even without flex fuel (Though this is moot without easy access) the fueling requirement differences between E85 and E60 are very small. You'd tune on verified E85, then just run a tiny bit rich on E60. NBD.

Otherwise, i'll echo what everyone else is saying here: That looks about right for 91 and 14psi. I have to wonder if the cam is helping at all, but the curve doesn't look horrible so i don't think it's hurting.

There is E85 at the station next to the 101 on Army St.(Cesar Chavez) that is the only station in SF. I am surprised that you can only run 14psi on 91.

14 psi sounds about right for the MBT detonation limit on 91 to me. There's probably a bit more if you're willing to retard timing away from MBT, but I would expect Jei @ blacktrax to go with a conservative/safe tune. Blowing up customer cars is not a good way to earn trust. :)

240 rwhp sounds a bit low (maybe 20 hp) for that boost level, although that might just be the dyno-to-dyno variance inherent to a dynapack (at least compared to dynojets).

The last time I checked (a few years ago) the E85 availability in the bay area pretty much sucked. It was much easier (albeit more expensive) to get 100 octane unleaded, and mixing that 50/50 with 91 worked well for me.

--Ian

Where did you get the 100 octane? South Bay 76?

There are three 76 stations I know of selling 100 octane (Foxworthy in San Jose, downtown Saratoga near the base of 9, and one in Redwood City). There's also a station in Sunol (I forget the name of that one) off 680.

I don't know if there any sources further up the peninsula near SF.

--Ian

They have multiple high octane options at Sears Point, up to 117 or something like that. Last I checked the 100 octane stuff was almost $10 a gallon, no idea on the higher blends. Might want to mention it to your credit card provider, my card didn't like spending that much at a gas pump.

I got the 100 before at Laguna for about $10/gal. My CC didn’t blink an eye. I think I have bad spending habits. LOL

:rofl:
Yeah, mine shut me off before it was full. Then it gave me some message when I tried again, all our cars have teeny tanks.

Yeah, gas pumps are a popular way for thieves to test out stolen credit cards because they're totally impersonal. If it doesn't work you just hop in the car and drive away without having to interact with anyone who might get suspicious. As a result CC companies tend to look at gas station transactions very carefully and will trigger a "see attendant" message for anything slightly weird...like trying to run the same card on the same pump multiple times in a row.

This is super annoying when you go to the gas station with 6 five gallon jugs and want to fill them up along with the truck for a track day. At today's CA prices, 30 gallons of 91 is $150 (two swipes) and then 30 gallons of diesel for the truck is another $150 (two more swipes). I've got one card that'll let me do two swipes, the others will only let me do one, so I wind up having to use all three of them to do this without going inside the store.

--Ian