Big Bore Boss build

[skwerl]

Gerald, the oil pan fits perfectly with the BMR K member and brace. Plenty of room to get a socket or wrench on the drain plug. There are pictures in the thread I started in the tech forum.

And if you want to only run 6 quarts it won't hurt a thing. The pickup still picks up the oil off the bottom of the pan so run as much or as little oil as you like. The dipstick reads full at 8 quarts but it will run just fine with only 6.

 

[BruceH]

Gerald, the oil pan fits perfectly with the BMR K member and brace. Plenty of room to get a socket or wrench on the drain plug. There are pictures in the thread I started in the tech forum.

And if you want to only run 6 quarts it won't hurt a thing. The pickup still picks up the oil off the bottom of the pan so run as much or as little oil as you like. The dipstick reads full at 8 quarts but it will run just fine with only 6.

After I found out how good the super tech synthetic is I think I'd much rather run 8 quarts of it vs 6 quarts of anything else. Right now I'm actually running 5 syn and 3 conventional. The cost is less than 6 of M1 or RP and I think I'm getting better protection. It's inexpensive enough that I can change it every 3000 miles and not feel like I'm throwing money away.

 

[SStang]

BruceH, What diameter is your headers, and what state do you live in?
Nice build!!!


Thanks.

 

[jodadejss06gt]

Bruce where is the link for the testing on the E50 and detonation?

 

[BruceH]

BruceH, What diameter is your headers, and what state do you live in?
Nice build!!!


Thanks.

2.5" Washington.

Bruce where is the link for the testing on the E50 and detonation?

It's out on the internet. I have read so many White Paper articles and University studies on ethanol that I can't remember the exact link.

I'd suggest using the search terms "ethanol, university, Minnesota, Michigan, MIT, detonation, compression, study, etc." in different combinations. Settle in for awhile because there is quite a bit of quality information out there to read.

 

[jodadejss06gt]

Thanks Bruce! Looking forward to this new build and I've also consider the Weisco's.

 

[one eyed willy]

Nice build bruce! Bet it's fun to drive with that compression!

 

[BruceH]

Nice build bruce! Bet it's fun to drive with that compression!

Thanks. It is fun to drive. Just like a pd blower but there isn't a blower. I wonder what a 2.9 Whipple would do to it, lol. I'd guess it would be well over 700rwhp on e85.

I need to stop those kind of thoughts though. It's great as is.

 

[one eyed willy]

Lol,if your already thinking about it then it's only a matter of time.....

 

[BruceH]

Just giving a quick update. I know that some people have been wondering what the mpg difference would be between E10 and E85 with this 12:1 compression motor.

Keep in mind that it's a 322 inch motor with decent power making cams so it's not built for fuel economy.

My one way work commute is about 15 miles. It covers a few miles of highway. Most of the drive is in urban and suburban areas. There is a fair amount of stop and go.

It got 16mpg with E10 on this route. I just filled up with E85 after converting from E10 about a week ago. The first tank of E85 got 14mpg. This is a difference of about 14%. So far the study I read about 14.5:1 compression getting the same mpg with E85 as a similar displacement gasoline motor is holding.

I'm wondering how high the compression can go and still be able to run 92 octane pump gas? Maybe 13:1? If I was in the Midwest I'd make a 14 or 14.5:1 motor because E85 and blender pumps are all over the place in that part of the country.

 

[s8v4o]

BruceH, What diameter is your headers, and what state do you live in?
Nice build!!!


Thanks.

2.5" Washington.

What about the primaries Bruce?

 

[BruceH]

What about the primaries Bruce?

1 3/4. I think that's the only size Mac offers for the 3v.

 

[Doug M]

It would be amazing with a power adder! Love the build, I would love to build one like yours!
It would be so much fun with a D1 or F1

 

[BruceH]

It would be amazing with a power adder! Love the build, I would love to build one like yours!
It would be so much fun with a D1 or F1

Thanks. It's a lot of fun right now. I've had more power before and actually prefer this setup over the 600-700rwhp setups I've had before. I'm sure that if I hadn't experienced it already it would be in the plans. Every now and then I think about a 2.9 Whipple or small turbo but that thought quickly passes.

I think that we get jaded by some of the awesome builds on this site. 437rwhp is still a lot of power. It's a little more than my Whipple had with a big pulley when the motor was stock. If the 5.8 blocks become available at a decent price I'd love to build one of them and see what could be done.

 

[Doug M]

Ha. N/A has to be fun at that power level. I can only imagine

 

[saleen07gt]

Bruce, I was wondering if you had a chance to dyno the car on 92. I was wondering what the hp difference is between the 2 fuels and tunes.

 

[BruceH]

Bruce, I was wondering if you had a chance to dyno the car on 92. I was wondering what the hp difference is between the 2 fuels and tunes.

Never did. The 92 tune is almost exactly the same except for the stoich, spark advance, and cold motor. There might be a few other differences that I can't remember right now but they would be small.

The 92 tune calls for a max of 28 degrees of spark. The E85 tune commands a max of 34. I'm fairly certain I could go higher with the E85 spark advance but I'm not sure if it will result in more power. In the past 33-34 was the best power I could obtain with E85. I have no desire to exceed 28 with 92 octane.

 

[BruceH]

The motor has gone through another transformation. A DOB kit was run for about 4 months. It's a great kit with a great price. However, I decided to remove it and return to na. It's what this motor was built for and it's a whole lot of fun.

A few datalogs with a stock intake have shown about the same amount of peak airflow as before. It's not an exact measurement due to all the variables but with the same commanded a/f ratio the maf is reaching the same voltage which should indicate that the airflow is close to what it was prior.

An FRPP intake manifold has been ordered. I'm hoping for a similar gain as before with it installed. The main differences with this configuration vs the last time it was na are the headers and cats. The prior set up had mac headers with high flow cats and a prochamber. This one has JBA shorty headers with factory cats. My ballpark method of guessing using indicated airflow shows that the exhaust isn't a restriction yet.

It will go on the dyno in a few weeks. This time on gasoline and with a 65mm throttle body. I did try a 60mm GT500 tb and the current 65mm tb. Both showed almost the same airflow in similar weather conditions. To me this indicates that the tb isn't a restriction yet.

 

[AutoXRacer]

Let me know where and when you go!!! I'd like to watch!!

 

[v8venomgt]

Your builds are frequent and always interesting. I'll definitely be looking forward to your progress. Off topic, but had you kept the DOB system, and upgraded to the '13 tvs what kind of numbers would you have expected with your higher compression motor? Would it have been manageable tractionwise?