XR7-4.6’s disjointed build thread 2 Electric Boogaloo

[Grog6]

As far as exhaust goes, the mbs 2.5" with a cheap set of mufflers is awesome on a 2v, I'm betting they sound as good on a 4v.
I tried to curl a 4v head today, lol. I have a ways to go to be fully recovered.
For some reason, I thoughy you bought longtube kooks. I have a 2v set of those I bought used. They'll go on lazarus. As soon as I get the red one driving, Lazarus' current engine is coming out.
Think I can keep a teksid shortblock from knocking with 2v heads and pi cams?

 

[XR7-4.6]

As far as exhaust goes, the mbs 2.5" with a cheap set of mufflers is awesome on a 2v, I'm betting they sound as good on a 4v.
I tried to curl a 4v head today, lol. I have a ways to go to be fully recovered.
For some reason, I thoughy you bought longtube kooks. I have a 2v set of those I bought used. They'll go on lazarus. As soon as I get the red one driving, Lazarus' current engine is coming out.
Think I can keep a teksid shortblock from knocking with 2v heads and pi cams?

I already have the mandrel bent 2.5” SS pipes, I have to redo the front half which is currently a catted H pipe for a Mustang. I’m leaning towards a mid mount magnaflow like I used to have

 

[Zep5.0]

I already have the mandrel bent 2.5” SS pipes, I have to redo the front half which is currently a catted H pipe for a Mustang. I’m leaning towards a mid mount magnaflow like I used to have

No rear mufflers? And I assume you do have cats?

 

[XR7-4.6]

No rear mufflers? And I assume you do have cats?

Current exhaust has cats but no mufflers, next exhaust will have 1 mid mount muffler and no cats. I don’t particularly like the look or sound of rear mufflers

 

[XR7-4.6]

First of the new items in!



And people say the pan needs to be removed to change the oil pump, bah!

 

[XR7-4.6]

This is way overkill for my goals but it’s a easy peace of mind mod





Why y’all ask? Only real flaw with the iron tensioners is if you build too much oil pressure and shock the valvetrain(aka high RPM launch) the tensioners can become hyper extended and the tensioners effectively becomes solid in a fixed position that can lead to guide wear chain stretch and even cam bore wear, as it is impossible for the guide return to normal operating position. Filing the last 3-4 teeth solves that but still does it’s intended job preventing total collapse with oil pressure loss like what happens to the plastic tensioners.

This useful as that means only my halfshafts will snap on a 5000rpm launch on drag radials, but not my timing chains!

 

[XR7-4.6]

Well the weekend and an evening or two project I planned this to be turned out to be slightly optimistic HOWEVER it is officially in the very literally loosest definition of the word cammed!



Now I’m getting excited!

 

[XR7-4.6]

It chops

I’m a real pro cameraman if you haven’t noticed.

Definitely need to work on the idle/dashpot in the tune though, it takes a lot of feathering and finesse working the throttle to get it to idle

 

[Grog6]

Sounds great! Are you wishing you went stage 4 on the cams or something?

 

[XR7-4.6]

Sounds great! Are you wishing you went stage 4 on the cams or something?

Given how clueless I am at dashpot tuning “of course 0.000768 decay is better than 0.000567, DUH!” No, these are aggressive just enough where I can baseline. They sound so great in person, I can’t wait to get the kooks on!


My only regret is not baffling the block drains with cardboard or something from gushing coolant onto the cats when I drained it yesterday, I fogged the neighborhood lol

 

[Grog6]

The first time I seafoamed lazarus, my neighbor showed up with a fire extinguisher,lol.
I drove my firebird home with a blown headgasket. Completely fogged the road. It blew just after I left work, to late to stop, lol.

 

[Zep5.0]

Sounds nice. I guess I assumed the headers were going on before you fired it up? Maybe I'm the only idiot that does everything all at once and makes a 5 year project.

 

[XR7-4.6]

Sounds nice. I guess I assumed the headers were going on before you fired it up? Maybe I'm the only idiot that does everything all at once and makes a 5 year project.

I always preferred do things in phases, doing things all at once leaves it vulnerable to project car hell and I’ve learned my lesson from a lot of people I know that’s happened to who ended up selling their projects in boxes 10 years later. There wasn’t that much danger of that with these items compared to past projects I’ve tackled in bulk but I also like to make sure the thing I just did works before I move on to the next big task… like if I didn’t quadruple recheck the timing and it being off a few teeth sent multiple valves through pistons, I don’t need to trouble myself with the header install

Plus I knew with these cams I’d need to mess with tuning, I’m not going to have the full exhaust together for probably a week or two after the headers are in and I’d rather finesse the getting it to idle and return to idle smoothly, as I plan to do the next few evenings, with the quasi quiteish exhaust it has now than open headers.

I’m also still waiting for the gaskets to arrive. The place I ordered them from turned out to be in CA so it’s taken over a week to ship and are supposed to arrive tomorrow. If they arrived on Friday like I expected (given I ordered them last Saturday) I may well have gotten it over with (or at least started) yesterday out of inertia.



Oh yeah I haven’t fired it back up to check but I completely forgot I had this band-aid under the IAC which may not be helping

 

[Grog6]

Is that the "moose call eliminator" plate?

 

[Chingon1]

Do you have that lil plate in the IAC so the RPM’s drop faster?? It’s like 20$ on eBay and helps with rev hang when changing gears, since you got the 5 speed.

 

[XR7-4.6]

Do you have that lil plate in the IAC so the RPM’s drop faster?? It’s like 20$ on eBay and helps with rev hang when changing gears, since you got the 5 speed.

Yes I put it on a few years ago for that reason, actually I forgot it was there!

I made that one from plain old sheet aluminum I had, I wouldn’t actually pay for one as you can get the same effect with the tune but I just got frustrated researching and trying things out to no effect

 

[Grog6]

The tbird did that a lot; but It doesn't do it now. It's sitting immobile with a freeze plug blown out, lol. Driving on the interstate in second will do that. Dumbass,lol. Took the idiot less than a year to kill it.
Theres a prob with the mlps circuit. moving the shifter will make it shift. It's in the connector in the console,that's the last thing.

 

[XR7-4.6]

The tbird did that a lot; but It doesn't do it now. It's sitting immobile with a freeze plug blown out, lol. Driving on the interstate in second will do that. Dumbass,lol. Took the idiot less than a year to kill it.
Theres a prob with the mlps circuit. moving the shifter will make it shift. It's in the connector in the console,that's the last thing.

It never bothered me with the auto(really with that trans it wasn’t even something I noticed). When I put the manual trans in I was surprised by the relative lack of deceleration off throttle, even with the restrictor it never quite matched the manual 1-2 of the auto with the bands applied or pretty much every carbed engine I’ve ever been around. I messed with dashpot and CFSO to try to induce a similar effect and unfortunately I simply cannot get the latter to work at all, and going wild with dashpot mostly induced exhaust pops which may impress BMW guys but… yeah, not me.

The good news is with this mornings tuning session I have some hope as the RPMs never decelerated like this. I’m inclined to credit that to the semi aggressive cam grind but my recent tunes with them and input opened my eyes a little to what I was doing wrong or too lazy to do.

 

[Grog6]

My tunes all have good decel; the only thing I remember having to do was lock the tc. The tc releases after a set time, so I extended it to a minute. I think I posted a copy, way back when we were talking about shift schedules.