This is getting exhausting....

Ok, I have more crap on the way...all my 4" stuff for the down pipe as well as the turbo feed line and drain flange...

I'll mark those off my shoping list.

Hi, my name is Holley...Blow Me!

(WARNING: long post.) My Holley 600 Double Pumper got the the blow-thru treatment today. I'm not really a carb wizard this is based on the hanger 18 mods (which has a much more detailed explaination of what I'm doing here) I started with a stock 600DP that I bought on ebay.

Disassembly. Removed the float bowls, removed the metering blocks, separated the body, removed the sqirters, and turned it upside down to get put the small check valve. Removed the accelerator pumps and springs. This has the old style with the check ball in the acc pump so I left that alone. Removed the needle and seats as well as the jets and the brass floats. This has vent extensions so I removed them as well. I also removed the idle adjustment screws and the cork gaskets. I then ran a file over the main body where the metering blocks mount to knock down any high spots. I went through with a razor blade and scraped down all the gasket surfaces clean.

Not necessary for blow-thru but helpful for tuning I took a file and knocked off the ridge on the vacuum port. This allows the bowl to be removed more easily for jet changes.

This is one of the big mods with a blow-thru...I drilled the PVCR (Power Valve Channel Restrictors) to .0650 The idea is this...when the power valve opens it allows more fuel into the main well...increasing the size of the PVCR allows you to richen up only under boost (when the power valve is open) and lets you run a smaller jet for cruise conditions. .0650 is only slighty larger than stock which is about .0590...but I can always go up if need be. The tape around the drill bit is so I accidentally do drill too far

...Here is the finished product. The metering blocks, float bowls, and other misc small parts then went for a soak in carb cleaner...The main body and base plate got a good scrub down with a soft brush and carb cleaner ...and then all got a blow dry with compressed air.

Next up Nitrophyl floats and jet extensions. Because with a blow-thru you are pressurizing the float bowls you cannot run standard brass floats...they will crush under the pressure. So, I added Nitrophyl floats which are solid and will not crush. The rear also got jet extensions as well...they come with a special notched float to fit over the extensions. These are so that under acceleration when the fuel sloshes to the back of the bowl it doesn't uncover the jets leaving you lean...not a good thing in a turbo car.

Bigger needle and seats. A blow thru can go through a lot of fuel...and the fuel system must keep up...this includes filling the float bowls...I added .120 needle and seats to allow more fuel into the bowls keeping them full under high demand conditions.

Power valve. Nothing fancy here...just a standard 6.5 power valve. We'll see how this works come tuning time I know a lot of blow thrus use something lower like a 4.5. [Edit: I ended up going with 4.5 to start with...]

The rest of the reassembly. Here are the metering blocks all ready to go back in...new jets, PV, needle and seats, and gaskets. I took a shot in the dark for jetting...I put in 74/84 as a baseline...I figure at least it should not be lean with this to start.

Next since the choke horn has been removed from this carb I have to block off the hole where the rod used to come through as this would cause a boost leak. I small chunk of the JB Weld Stick worked great.

That is it. Here it is reassembled. I'm still gonna run some epoxy over the tops of the metering bocks where the plugs are just for extra insurance so that the boost won't blow them out...but otherwise I'm ready for a blow.

I mounted my turbo...and didn't even buy it dinner.

I finished up the turbo mount today. I got the support rods made and the center cut out to fit the flange I had made previously. I mocked it all up and it fits pretty well...maybe just a little trimming to clear the drain flange...but for the most part done.

Casualties of war..

Some days it just goes this way...

While working on finishing up the turbo mount...I burned up my 4" angle grinder...dead, finished, gonzo. It was a cheap-o that I have abused for a couple of years so no big loss.

...Next the air compressor started making a strange noise..I went and investigated an it had broke the feed line...it was 5/16 copper and of course neither Lowes nor Home Depot carries it...But my boys at Loop Road Auto Parts came through...they had a steel 5/16 and the compression fittings (although I don't get a warm-fuzzy from 120psi and compression fitings)...I came home repaired the line on the compressor and back to work...


So while finishing up some holes for the rods I had made, the drill jambed and bit the big one...another one on its way to the great power tool graveyard...

This must be a record for me...breaking three power tools in one day.

Fuel system almost there....

Well, my fuel cell arrived today...and I ordered (most of) the rest of the fuel system...including the cell brackets, Mallory 4309 regulator, hard lines, and fittings. I also remembered to order the missing bracket for my quarter stick. I'm still gonna be shy a filter, and some braided lines to the carb

Since my boy is way into drag racing at the moment I also have (as he calls it) a "ready, steady, go light" (Christmas tree) clock coming for him.

Dictionary.

Squat [skwat] –noun Slang. (usually used in the negative)
1. A minimum amount or degree; the least bit.
2. The amount of work I got done on the truck this weekend.

So, no carb build, no finishing the support rods, nada, zip,...squat. Yard work all damn day...

Carb build coming up....

I went out tonight and bought the drill bit I need for drilling the PVCR (Power Valve Channel Restrictors) in the carb...So, I have everything I need now. I will be doing the tear down Sunday...and maybe reassembley...depending on how long I soak stuff...Stay tuned.

Fuel Cell

Snagged a fuel cell on ebay tonight...an RCI brand new for $67...sweet...I can mark that off my Shopping List

Flange done.

I also managed to get the flange finished today...it was much work work than expected getting the hole in the center to line up with the pipe. Anywho, it's done...I decided to go ahead and weld it myself with my little 110V wire-fed...and it turned out pretty good...I set it to low with the range in low and it made much prettier welds with less splatter...I might even consider welding up some of the other stuff myself...

Holy crap an EZ-Out actually worked.

The turbo I bought had 2 broken bolts in the housing...so I took it a part today and drilled them out...put in the ez-out and much to my surprise they both came right out...I have not had much luck with ez-outs in the past one more than one occasion I have broken the ez-out inside the broken bolt...that really sucks...because drilling a broken ez-out will wipe out a drill bit in a hurry...anyway...I bought some new bolts and the turbo is now ready to go.

10.5 Outlaws at The Rock

Ok, The race season has offically started for me...not that I'm running - yet...but that I'm spectating...I went to The Rock last weekend for the Spring Civil Wars...Tim Lynch was there with his new ride and was bad-ass. He riped off a couple of high 4.20's @ 180+ mph...on 10.5's that's pretty impressive. Couple of guys stuffed cars into the walls..one Saturday a yellow twin-trubo mustang...and a nitrous Camaro that had a bye going in the finals against Lynch...that's right...packed it into the wall on with an empty lane next to him when headed to the finals!...giving Lynch the event win.

Shopping List

I decided to keep a list of what I still need...so, here goes:

• Turbo downpipe (4" mandrel bends & v-band)
• Turbo drain/feed fittings and lines
• Fuel Cell
• Fuel Reguator
• Fuel Lines
• Fuel Fittings
• Electric Fan
• Switch panel (for pump and fan)
• Boost Controller (manual)
• Blow Off valve
• Cold-side pipe
• Cold-side pipe couplers
• Battery reloaction kit

I think that will be enough to get me running...well, that and a bunch of time.

Pssst...Dave, I got the stuff....

Dave's not here man...But I did get the stuff. All my Holley stuff arrived from Summit...
The 4" bends deal did not come through...but I found mandrel-bends.com (a site sponsor of turbomustangs.com) that has the cheapest I've seen. So I'll heve them coming soon....
So just lookin for some time to get more done...Tomorrow looks good...

Hey Mr. UPS man...hurry up!

I ordered some more stuff for the truck today...is it here yet? Bunch-o-Holley parts for the blow through conversion...Major kit, nitrophyl floats, jet extentions, jet assortment and .120 needle and seats...as well as the heim joints (ok Summit referes to them as Rod-Ends) no one had locally....and a Summit coloring book for my boy!

I'm also trying to round up some 4" exhaust pieces from a guy on turbo forums..we'll see how that goes....

Cost: $152

Being back from vacation is Flangetastic!

Back from vaction...and back to work on the truck...I had no flange for the turbo...it's an oddball...it's a T4 international...which means that it's slightly different than a regular T4. So, I decided to make one. It's not welded up yet...but you get the idea.


Cost: $0

Nothing going on...

I haven't posted in a while...just haven't touched the truck...busy one weekend...cold-as-ass the next...going to be out of town next...so no work there either. Good news is I have a shopping list of stuff coming from Summit...carb mod stuff, heim joints, battery relocation kit, and the fuel regulator... With the exception of fuel lines and such this just about wraps up my parts needs.

So many parts..so little time to install them....I'm hoping the upcoming daylight savings switch will give me some time after work so I'm not trying to stuff it all in on the weekends...

Bye Bye TPI

The TPI is on it's was to Louisiana. It went for $202.50...$102.50 profit...not bad for doing nothing but spraying it down with carb cleaner and taking a picture of it...

Double Pumper is here.

The 600 double pumper I bought off ebay arrived last night...looks good and has a professionally milled choke horn...not a hatchet job...I'm happy about that...now to sell off all the Edelbrock stuff....

Update: The TPI ends on ebay tomorrow I'm hoping it will go for around $200...it is at $137.50 now and has 23 watchers...There is another one on craigslist for $125...do I dare do it again?

Squirt, Squirt

I snagged a 600 Double Pumper on ebay for $70...I will be doing what is known as the Hanger 18 mods (See: Hanger 18 Fabrication) to it...so stay tuned for that...One of the mods it to mill off the choke horn. With a blow-thru you have to remove it for use under the bonnet. This one already has that done so that is a big bonus for me as I don't have a mill and would have had to do it with a Dremel.

Cost: $70

Oh and I put the TPI on ebay last night and it already has a $125 bid...so I'm making money for sure there...I watched two others go for over $200...so I set the buy it now at $250...well see what happens when it ends Saturday.

Merge Pipe part 2

Ok I made the merge pipe today...and managed to not screw this one up! So it is good from the headers up to the engine compartment...I ran out of cutting wheels so I called it a day or I would have added the 90 and pipe up to the turbo. I have a hard section between the headers right now...I'm debating on adding a flex pipe here to allow for the expansion due to heat (reducing the risk of breaking welds - but they cost about $40...)