Jump to content
Sign in to follow this  
paulmcclung

V6 Hatch

Recommended Posts

Still not decided what to do about the space where the power steering pump used to be. What about one of these on the v6? http://cgi.ebay.co.uk/ws/eBayISAPI.dll?Vie...hlink:middle:uk

Anyone know what other mods to the engine would be required.

You would need to check the compression ratio of the V6, if over 9:1 then you would really need to be looking at reducing it to 9:1 or preferably lower.

Using an intercooler will help.

some sort of ignition retard system.

Oh heck can't think of all the stuff you need to look into, but basically not a simple bolt on with injection.

A simpler way would be to have 3 downdraught twin choke webers on top of a eaton type supercharger bolted in between the heads, but you would need one hell of a bonnet bulge for that

Share this post


Link to post
Share on other sites
A simpler way would be to have 3 downdraught twin choke webers on top of a eaton type supercharger bolted in between the heads, but you would need one hell of a bonnet bulge for that

Or sticking thru the bonnet sideways, LOL

Share this post


Link to post
Share on other sites

Well looks like I am going to need a bonnet scoop to clear the plenum on my V6 can anyone recomend one that looks decent on a manta.

Share this post


Link to post
Share on other sites

Pulsar GTiR scoop. Either cut out the front end muscle car style, like I have, or, fill and smooth it for a, well, smooth look.

SP_A0152.jpg

Share this post


Link to post
Share on other sites

Finaly got a dry day. Sump is now all complete after a few more mods and got everything sitting where I want it to make up the engine mounts.

Started on the left one today. Just hope these will be suitable as I have never done anything like this before.

Project images are available to Club Members Only, Click to become an OMOC Member.

Project images are available to Club Members Only, Click to become an OMOC Member.

Share this post


Link to post
Share on other sites

Nice to see my old V8 crop up on here again Pete.

As for a hood scoop I believe there is an interference towards the front of the V6 and the bonnet that causes the headache and an awkward area to make a bulge/scoop that would be fitting with the lines of the Manta's bonnet.

Engine mounts...

No disrespect here Mr. McClung But would suggest gussetting the engine mounts you have made.

In other words putting triangular sectons in between the bit that bolts against the block to the bit that bolts onto the rubber engine mount on the crossmember.

Basically if you have good penetrated welds (which you should have on what looks to be 3mm steel) then they will be really strong, but will be prone to cracking along the stress lines in the material along the weld seam due to the shrinkage of the steel around this area from the sheer physical process of welding coupled with the vibration and twisting force of an accelerating engine.

Adding "Gussets" should stop the load of any forces acting on the weld seam and the gussets will strengthen up to a HUGE extent the mounting bracket/s you have made.

Easy enough to do, downside is . . . . it can then be a bit of a bast to get a socket and wrench on to tighten up the mounting bolts. Or nuts even :thumbup

Edit:-

Just looked again at your pics, and look to be using some good thick steel and can see what you have done but would still try and put a bit more triangulated steel in there if poss, it does look tight to do this, but you will benefit from it in the long run, the V6 as you possibly well know is not a light lump and does create some damn good torque for the engine mounts to handle.

Share this post


Link to post
Share on other sites
Started on the left one today. Just hope these will be suitable as I have never done anything like this before.

I'm no structural engineer so i could be wrong but I would say that needs some more bracing (or triangulation) otherwise there'll be an excessive amount of stress on that bottom weld

EDIT - D'oh, too slow, I see clive's already posted up a much better comment

Share this post


Link to post
Share on other sites

Thanks Opel2000 and Christ. I was kind of hoping to get a response from some of the more engineering orientated people like yourself Opel2000. Sorry Christ I just realised how that sounded lol. All I mean is I have seen Opel2000's work up close.

I did think I needed some sort of bracing on the bottom but I am strugling with where exactly I should possition it so as not to interfere with either the chassis mounting point or the bolt holes for the base plate.

As for the Steel I am using I am not sure what it is but it does seem extremely strong. It is three mm thick as you mentioned but I am not sure if it has been tempered or something as the bench drill I am using struggled to get through it.

Share this post


Link to post
Share on other sites
As for a hood scoop I believe there is an interference towards the front of the V6 and the bonnet that causes the headache and an awkward area to make a bulge/scoop that would be fitting with the lines of the Manta's bonnet.

You could not be more right on that one Clive as I found out the other day. I am having to work on the car outside at the moment so the bonnet has to go back on at the end of every session to keep things dry. I sat it on a little bit too quick last session and now have a nice outline on the bonnet showing where the scoop will need to be . Ahhh the joys of moving large chunks of 22 year old steel around by your self :hair ...

Share this post


Link to post
Share on other sites
Thanks Opel2000 and Christ. I was kind of hoping to get a response from some of the more engineering orientated people like yourself Opel2000. Sorry Christ I just realised how that sounded lol. All I mean is I have seen Opel2000's work up close.

That's OK - I've seen opel2000's work up close and it is nearly as good as I can do

I would be tempted to move the chassis engine mount bracket so it's in line with where it attaches to the engine, that way you're reducing the stress to one direction

I know it's easier said than done though as you've got to think about manifold clearance and access to bolts

Are you using lubrication on the drill or got it on to higher speed?

Share this post


Link to post
Share on other sites

I am sure something like those would work, however I dont think my skills are quite up to that standard so will persist for now and hopefully the engine will not fall out lol

Share this post


Link to post
Share on other sites

Hi, Ive got the 3ltr v6 lump from a omega in my manta! had it in all year and it goes realy well.

well worth doing

Stu

Share this post


Link to post
Share on other sites

lol I know you have one opelstu I was watching your conversion on clanmanta site and emailed you a few times for advice. When you coming through to Falkirk to help with mine. Beers will be on me.

Share this post


Link to post
Share on other sites

Not a prob Paul. I will help in anyway I can. Car of the road for the winter tho but you are more than welcome to have a look at any bit of my car to help aswell.

Stu.

Share this post


Link to post
Share on other sites

THis project is not taking a break it is now officialy dead...Given up due to time restraints and getting too fat to bend over cars lol so going back to CIH.

Thanks to all who helped and sorry it will never be completed.

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Sign in to follow this  

  • Recently Browsing   0 members

    No registered users viewing this page.

×
×
  • Create New...