Discussion
Steve, I'm not so sure about the result. The base of the windshield is usually a high pressure area, often used by people as an air intake in older carburetted vehicles. Some US manufacturers called this "cowl induction" and showed measurable gains. I see that in your case, the open section is farther forward than would be used to take maximum advantage of the high pressure but you may still get some interference from that effect.
It's wise of you to consider how much more heat energy your LS lump will have to shed as this stage. A couple of suggestions I would offer are:
1.) look for air outlets closer to the radiator and
2.) incorporate a raised lip at the leading edge of the opening.
If you lead the hot air from the back of the radiator to an air outlet in the hood and have all of that fairly well enclosed, it should help to not heat soak the engine compartment. Having the air channeled out at a more forward location may also help, albeit in a small way, to create more downforce where the aero of YOUR M will require some help.
Have you thought about securing the windscreen and back glass?
Best,
B.
It's wise of you to consider how much more heat energy your LS lump will have to shed as this stage. A couple of suggestions I would offer are:
1.) look for air outlets closer to the radiator and
2.) incorporate a raised lip at the leading edge of the opening.
If you lead the hot air from the back of the radiator to an air outlet in the hood and have all of that fairly well enclosed, it should help to not heat soak the engine compartment. Having the air channeled out at a more forward location may also help, albeit in a small way, to create more downforce where the aero of YOUR M will require some help.
Have you thought about securing the windscreen and back glass?
Best,
B.
Yes, I did notice that the extra bump in the hood looked like the ones on both Jos' and J.S. racers. Good that you're bonding in the glass and tying it into the cage.
Are you familiar with the Zimmerman(n?) car? There was some aero work done on it. One of the (more subtle) changes was the downward extension of the curved section of front wing under where the front bumper normally sits. That looks like a good idea. I'm sure it helps to reduce the pressure build up. I'm considering lengthening the top plane forward a few inches and rolling a (.75") radius into the grille to help a little. Even though I heard B.Z. had help from professional automotive aerodynamicists, the curve under the lower part of the grille looks like an incredibly stupid idea and the overall treatment of the grille area looks hideous (TO ME). There are (were) some beautiful details on the car though. Although there were rumors of a venturi at the rear of the car, I don't see it in these pictures. I think measures to reduce rear lift are imperative with a missile like yours and you may want to consider this option. Also, removal of the rain leaders is good for top speed, so is a tiny mirror.
DISCLAIMER: I am not the copyright holder to any of the above images and will remove them as soon as I am asked to do so. (and thanks if you don't
)
No job yet. Over 100 resumes emailed out, another dozen handed out in person. I've applied to vintage racing shops (you'd be amazed at how many there are around here), architecture firms, restaurants, and construction companies. I have had one phone interview and three in person but no offers yet. I'll have to try harder.
I've been dealing with cancer since late in July so my time and energy have been greatly reduced. Radiation treatments were finished Monday evening and I'm feeling tons better already. Not to belittle other peoples' medical issues but with the exception of missing one of my boys, this was no big deal. At least I didnt do it skateboarding. Now I have to get something before the money runs out. I'll be finishing and selling my 1970 Moto Guzzi soon.
Best,
B.
Are you familiar with the Zimmerman(n?) car? There was some aero work done on it. One of the (more subtle) changes was the downward extension of the curved section of front wing under where the front bumper normally sits. That looks like a good idea. I'm sure it helps to reduce the pressure build up. I'm considering lengthening the top plane forward a few inches and rolling a (.75") radius into the grille to help a little. Even though I heard B.Z. had help from professional automotive aerodynamicists, the curve under the lower part of the grille looks like an incredibly stupid idea and the overall treatment of the grille area looks hideous (TO ME). There are (were) some beautiful details on the car though. Although there were rumors of a venturi at the rear of the car, I don't see it in these pictures. I think measures to reduce rear lift are imperative with a missile like yours and you may want to consider this option. Also, removal of the rain leaders is good for top speed, so is a tiny mirror.
DISCLAIMER: I am not the copyright holder to any of the above images and will remove them as soon as I am asked to do so. (and thanks if you don't
)No job yet. Over 100 resumes emailed out, another dozen handed out in person. I've applied to vintage racing shops (you'd be amazed at how many there are around here), architecture firms, restaurants, and construction companies. I have had one phone interview and three in person but no offers yet. I'll have to try harder.
I've been dealing with cancer since late in July so my time and energy have been greatly reduced. Radiation treatments were finished Monday evening and I'm feeling tons better already. Not to belittle other peoples' medical issues but with the exception of missing one of my boys, this was no big deal. At least I didnt do it skateboarding. Now I have to get something before the money runs out. I'll be finishing and selling my 1970 Moto Guzzi soon.
Best,
B.
jellison said:
Steve - does it need that bonnet bulge - does not look like it from the install pics. Mine easily cleared a low Chim hood.
No it easily clears,i'm using the bonnet bulge to reduce heat build up.Alot of large engine M's seem to suffer overheating problems,i also think it will look rather good with the SE arches.
Need to get better pics so you can see how low the engine is,the bottom of the sump is 2 1/2" below the chassis.
Hope that this isn't a repost.
Steve, have you seen this?
Good luck, Jonathan
Steve, have you seen this?
jellison said:
The Brian Hough Modsports Beast.
Unfortunately he met his maker in it when a caliper came loose at Thruxton (eek - worse place it could happen).
This thing was a natural progression of the Griffith from the 60's, but with wide 70's slicks, vented big front brakes and replacing the re drums with discs too and with about 500+bhp from a stretched SBF
BTW you may want to add a gurney flap at the rear of the bonnet.Unfortunately he met his maker in it when a caliper came loose at Thruxton (eek - worse place it could happen).
This thing was a natural progression of the Griffith from the 60's, but with wide 70's slicks, vented big front brakes and replacing the re drums with discs too and with about 500+bhp from a stretched SBF
Good luck, Jonathan
JR said:
Hope that this isn't a repost.
Steve, have you seen this?
Good luck, Jonathan
Thanks Jonathan,seen the pics about a year ago would have been nice to see it in action Steve, have you seen this?
jellison said:
The Brian Hough Modsports Beast.
Unfortunately he met his maker in it when a caliper came loose at Thruxton (eek - worse place it could happen).
This thing was a natural progression of the Griffith from the 60's, but with wide 70's slicks, vented big front brakes and replacing the re drums with discs too and with about 500+bhp from a stretched SBF
BTW you may want to add a gurney flap at the rear of the bonnet.Unfortunately he met his maker in it when a caliper came loose at Thruxton (eek - worse place it could happen).
This thing was a natural progression of the Griffith from the 60's, but with wide 70's slicks, vented big front brakes and replacing the re drums with discs too and with about 500+bhp from a stretched SBF
Good luck, Jonathan
Gurney flap at the rear of the bonnet? any pics
grahamw48 said:
If the the above car ever ran at Croft in the 70s, then it was the one that made me determined to one day own a V8 TVR.
Not sure on how much racing it did pre biting the big one.Yep it inspires me. Hopefully mine will be along the same lines, but with slightly smaller arches and no rear discs (similar or more grunt - engine tech moved on
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