Compression for Blown Alcohol Engine ??

[73 Sanger Flat]

Ok Guys , been thinking  and that normally gets me into a lot of trouble ..

What is the maximun compression ratio that you can do for a Blown Methonal  Engine ??  I juts love the sound of an Alcohol Blown Engine ...

Anybody have any experience with this set up ??

 

[J C Gordon]

Need 3boatPaul or Badblood to chime in here. They both have run time with these setups. May PM them.

 

[73 Sanger Flat]

I will see if they chime in later , if not i will PM one of them . I think it is like 11-11.5 on the compression .. It just a pipe dream right now ..

 

[3boatpaul]

  think.gif  think.gif  think.gif OOOOOOOOOboy lot's of veriable's on this one.
  race deal or lake ??  fuel,  meth or e85/    block,  standard auto or after market.
  static compression can be anywhere from 8.5 to 1 to 16 to 1  then you get into the dist. and electronic's deal.  a 7al work's unless you start getting crazy with boost and static comp.then it's time for a msd-10 + or a super mag.  blower size, boost  fuel delivery.    all play in to what you want the motor to be.
  a thought to remember there are subtel differance's between building a gas verses a alky motor.
 
  not trying to scare you off of it . the alky deal's are great,  fuel is cheaper, tuning window's are a whole lot more forgiving.    you just need to know wether you want to be miled or down right bad to the bone.
 

 

[jimsplace]

Billy

Without any water in the river does it make any difference?  The boat performance is the same if it's on the trailer.

 

[73 Sanger Flat]

Billy

Without any water in the river does it make any difference?  The boat performance is the same if it's on the trailer.

That is the problem Jim , with no water to go play on , it gives me more time to dream of what I want

 

[73 Sanger Flat]

  think.gif think.gif think.gif OOOOOOOOOboy lot's of veriable's on this one.
  race deal or lake ??  fuel,  meth or e85/    block,  standard auto or after market.
  static compression can be anywhere from 8.5 to 1 to 16 to 1  then you get into the dist. and electronic's deal.  a 7al work's unless you start getting crazy with boost and static comp.then it's time for a msd-10 + or a super mag.  blower size, boost  fuel delivery.    all play in to what you want the motor to be.
  a thought to remember there are subtel differance's between building a gas verses a alky motor.
 
  not trying to scare you off of it . the alky deal's are great,  fuel is cheaper, tuning window's are a whole lot more forgiving.    you just need to know wether you want to be miled or down right bad to the bone.

I would want it to be able to run it on the lake also so not all out race .. I like what Jim has done to his boat . His is a 540 with a 14-71 on E-85..

My current engine is 555 Cubic Inch 13.5 to 1  ,, Dart Big M Tall block , Dart Pro One heads , Callies Compstar Cranks , Scat Rods  6.8 long  , JE Pistons , Jomar stud Girdle , Isky 730 lift cam , currently running a BLP 1050  E-85 carb , MSD 6A-L box, with a digital retard box to help start .. I have not got this deal dialed in yet , so I might be good once it makes all the power it can ..

So what would be an optimun compression for an E-85 or Methonal  set up for lake use .. Something like 10 to 1 ??, Thinking of getting an 8-71 blower so i would not need a crank trigger or offset dist. I know it is close to being too small for a 555.. Would the MSD 6A-L box be OK ??  I just want something around a 1000 HP ..


Like I stated before , this is only a dream right now ..

 

[jimsplace]

Billy

Get the 14-71.  They don't cost that much more than an 8 or 10 and with your motor size it is not too big.  Go with a crank trigger and low profile distributor, you don't need an off-set distributor.  I can take my distributor out with the blower removed and the manifold still in place.  Removing the blower is easy, eight nuts, carb linkage and fuel lines and a hoist.  Blowers aren't light.  How often do you take your distributor out?

On the other hand, your combination has the capability to run as fast I think you really want.  Look at the pro-gas flat record and compare it to the blown-gas record.  Both are basically unlimited modified engines, so it is a fair comparison.(the blower engine can actually be bigger)  There is not much difference in et.

 

[73 Sanger Flat]

Jim
I am hoping to get this E-85 engine running faster.. I might take it to 'J' in Abilene and let him put it on his Dyno this winter so i can get it dialed in .. If it get me the speed I want,  I will be happy but I will still want a blower engine .. I just love the way they sound and make power .. I don;t think My E-85 engine is making the power right now . i think it this new carb that I have .. I going to try and run  some race gas and my old 1250 carb and see what it does , and then borrow a E-85 carb from EO and see what it does ..

If you just turn your back for about an hour with your boat at the ramp  , all my troubles will be resolved  .. LOL ..

 

[jimsplace]

I hope your not talking Steele Creek any time soon.

 

[73 Sanger Flat]

Not sure when  or where  , maybe if we get some  rain before winter gets here I will be able to finish testing or it going on the Dyno this winter

 

[3boatpaul]

  think.gif think.gif think.gif OOOOOOOOOboy lot's of veriable's on this one.
  race deal or lake ??  fuel,  meth or e85/    block,  standard auto or after market.
  static compression can be anywhere from 8.5 to 1 to 16 to 1  then you get into the dist. and electronic's deal.  a 7al work's unless you start getting crazy with boost and static comp.then it's time for a msd-10 + or a super mag.  blower size, boost  fuel delivery.    all play in to what you want the motor to be.
  a thought to remember there are subtel differance's between building a gas verses a alky motor.
 
  not trying to scare you off of it . the alky deal's are great,  fuel is cheaper, tuning window's are a whole lot more forgiving.    you just need to know wether you want to be miled or down right bad to the bone.

I would want it to be able to run it on the lake also so not all out race .. I like what Jim has done to his boat . His is a 540 with a 14-71 on E-85..

My current engine is 555 Cubic Inch 13.5 to 1  ,, Dart Big M Tall block , Dart Pro One heads , Callies Compstar Cranks , Scat Rods  6.8 long  , JE Pistons , Jomar stud Girdle , Isky 730 lift cam , currently running a BLP 1050  E-85 carb , MSD 6A-L box, with a digital retard box to help start .. I have not got this deal dialed in yet , so I might be good once it makes all the power it can ..

So what would be an optimun compression for an E-85 or Methonal  set up for lake use .. Something like 10 to 1 ??, Thinking of getting an 8-71 blower so i would not need a crank trigger or offset dist. I know it is close to being too small for a 555.. Would the MSD 6A-L box be OK ??  I just want something around a 1000 HP ..


Like I stated before , this is only a dream right now ..

  look's like you have a good foundation , love dart block's  super beefie main's  and  nice to have  the extra  head stud above the cyc. for more head clamping ability.  at 13.1 --- if you can get you'r carb dialed in and
the tune right for e-85 i think you might be happy until you can get where you want on a blower deal. like the 10-1 or 11-1 deal's    but at 13-1 n/a should hit good.
  if it was me i would do the e-85 deal. just because i use to use methanol, DAM GREAT STUFFf. BUT the down
  side is  1 corrosive as all get out , just plain messy ,will poison your self if not carefull, bla bla bla.  :smile20:
  the 555 i'm building will be a solid block using 9.8 to 1 piston's  with  canfield head's . but this will be a n/a motor. kind of going back to my orignal root,s  will be an alky motor on 3 stage's of nos . this is about as much as i'm going to let out about it.  :smile30: