To flow all eight will cost
Flowing 2 prior to then after providing they are using calipers/propering measuring tools youll probably be Ok. Hard for me as I get ocd and make a career out of those stupid things lol. Porting those is a rediculous amount of work to do one right, most shops wont come near them. About 10 yrs ago I aske a shop about doing one...wanted 850 and didnt really want to do it. Thats where I started up...

 

Not sure how they came up with these numbers but if they're correct & there isn't too much variation between ports, I'm Happy (No way of really knowing unless I have all the ports flowed. Therefore, Ignorance is Bliss)

Really hoping to see some gains on the Dyno!

Valve Lift CFM Head Flow Before Porting After Porting
0.100 66 64 65
0.200 121 117 119
0.300 182 177 183
0.400 231 213 225
0.500 264 235 253
0.600 275 241 262

 

The build as you described it should produce much better numbers than you attained. I did a similar build with a '90 L98, it is also a 700r4 but with speed density not MAF. My post build numbers were unbelievably low 244hp and 338tq at the wheels.

I spent 8 months obsessed with trying to locate the cause of my lost HP/TQ. Tore it down, checked everything, put it back together again. Back to the dyno. Threw parts at it. Back to the dyno. Tuned and re-tuned, back and forth to the dyno. Thoroughly pissed off, almost ready to give the car away in disgust, I moved on to the next mod. Swapping the 700r4 for a T5.

Unexpected results. With the T5 installed the dyno showed an increase to 289rwhp and 398rwtq. No other mods/changes.

What I concluded is in some way the combination of performance mods and 7004r were incompatible. I never got to the bottom of it, never did figure out why, I did not care.

Not saying your 700r4 is your issue, just saying it was my issue and I never suspected it.

...

 

Palric, I could have been your trans, but it was more likely the torque converter.....

 

I think you are correct. But I never had it checked.

Just wanted to make SixSeriesCSi aware that this kind of thing is possible.

best regards

 

I'm sorry to say but that sounds like a terrible story, nevertheless I'm glad you shared it with me.

I'd definitely like to switch to a manual transmission in the future (hopefully sometime in the near future).

 

Keep in mine conditions and dyno settings. They make various corrections (temp humidity SAE etc) which affect the reported numbers. It could be incompetence or just simple error but a bad correction could make it go either way. Also, different types of dynos skew the numbers somewhat. Constant load vs inertia dynos would probably report different numbers for the same car in the same conditions. Try not to fixate on the number and cross check it with other measures such as gpro and drag speeds.

 

Mustang-brand dynos can be real heartbreakers.

 

It was a Dynojet Dynometer...

 

Here are some photos of the passanger side ports, what do you guys think?

 

Pictures can't tell the whole story, but those look as good or better as any I've seen on this board over the last 15+yrs. Who did it? Based on your results you will drive me to pull apart my good running vortec set up and port the base. That seems to be the key to a TPI making any real power at all.

 

That end of the base was never the problem.
The head side of the base is where the restriction is.
Bring it by and I will measure it and tell you if it is good or not.
The narrow part is 1 1/2" - 2" inside the head side.

 

.....

 

Thank You for taking a look at it Don

 

No problem, I wish I could have had better news for you tho.
At best is is 1.7 sq. in. on the head side, it is 2.3 or better on the runner side. it needs to be around 2.3 to flow upwards of 300 cfm.
A regular 4 barrel manifold flows around 320 so you need that much to make a TPI
make good power.

 

Don, can a vortec base get there without welding or thin casting issues? Also can it be done with unported heads? Can you divulge how to measure properly/what we should be looking at? Even better a pic?

 

No way, it is a thin casting and is not much better than stock.

Using snap gauges, measure the head side opening 1"- 2" inside ...
width X height X .785 =sq.ins.

 

Don, are there any gains to be had with the vortec base? Seems hard to get over 300whp in the real world with the vortec.


Is the only real way to big power a ported accel base, or a first with AFR's

 

Out of the box that manifold isn't much better than stock.
The real gain comes from the heads.

After mine was welded and ported with E-tec heads I got 370 to the rear wheels.

 

Kennerz, here's a link for you...

https://www.thirdgen.org/forums/tpi/...pi-intake.html

 

Don, am I reading this correctly? You ported the Voctec Base to 1.86 sq. in and it's 1.77 sq. in. stock?

 

Here's the link to the thread

https://www.thirdgen.org/forums/auto...-polished.html

 

It's Official, Dyno Day 2016!

https://www.thirdgen.org/forums/sout...ocal-dyno.html

 

Deja Vu to Dyno Day 2011. ECM didn't want to read out...

But,

I'm Happy!

312HP & 359TQ

 

Nice. A 50hp gain is solid. Gotta graph to show?

 

Thank You to Dyno Don & Kevin91Z!!

Much Obliged,

 

Here you go...

 

So what ultimatly gave you the gains?

 

Not sure, too many different variables changed. Ported the TPIS Big Mouth Manifold, Switched to 30LBS Injectors, Switched to a TPIS 58MM Throttle Body and the Plenum also received a slight polishing job.

 

If you look at the graph you'll notice that the Air/Fuel Ratio is not ideal. We couldn't get anymore fuel into the engine. I replaced the fuel filter and it may have been clogged as it had a lot of debris and rust particles. Hopefully there's some untapped HP to be had there... The next modifications will be to add a Power Steering Pump, Upgrade to 1 3/4 Headers, Swap over to an Aluminum Driveshaft & NOS!

 

Looking at the fuel curve I bet you have another 20 hp waiting for you.

 

im almost building your exact combo

 

I sure hope so

 

What are you doing differently?

 

a little different cam and different headers .. same afr 180 heads , tpi big mouth intake and as&m runners .. who ported your tpi big mouth intake ?

 

I'm interested in hearing which cam your going to use. I sent it out to TPIS, albeit I was somewhat disappointed in that they didn't flow all of the ports and I don't know which ports they actually flowed. See Post #52.

My biggest gripe has to be the total cost as it wasn't cheap.

 

less than ideal? I'd say you're very lean. I would start at 12-12.5 and lean it out from there. When you say you couldn't get anymore fuel into the engine what do you mean? Were the injectors at 100% and do you know what the fuel pressure was holding?

Does it run this lean when on the road? I ask because with my Camaro I think the ram air on the road would lean it out slightly so I would keep it a little rich on the dyno.

 

The ECM was not reading out so we tuned the car with the O2 Sensor from the Dynometer. Since we were not connected to the ECM we could not see if the injectors were static (100%). I did not have a fuel pressure gauge connected. The car hasn't been tuned for the street yet so it runs like crap...

 

Picked up a set of Doug Thorley Tri Y Headers!

The��to 400lbs Torque!!!

 

I saw previously in the thread you might go NOS. I have a real nice dry kit for sale complete with remote bottle opener, vent tube, autometer pressure gauge, aluminium bottle mounts and purge kit. PM me if interested

 

I guess I can sell the ones I have been saving for you then

 

Don, I've been trying to save $$$ for a set of Dyno Don Headers but it's been tough....

 

So were you adjusting fuel pressure? did you ever get this straightened out?

PS Dyno Don, what headers do you have available? You can post or PM me. I am currently running Hooker shortys at 1 5/8 OD and believe I may benefit from larger OD and longer lengths. I'm concerned about road clearance with full length headers so a mid length would be great and the reason I haven't gone with that style. Also, I am running the exhaust back next to the trans so the drivers side kicking into the oil pan for the stock route isn't desired. Sorry for the hi-jack.

 

No adjustment was made to the Fuel Pressure. I believe the fuel filter was clogged but that hasn't been confirmed. I need to set up a tuning session with KEVIN91Z

You and the guy trying to sell me some NOS (Post #90)

 

 

Dyno Day 2018 - March 24th

Really Hoping for 40+ HP/TQ

Power-Steering ✔

Aluminum Driveshaft needs a Transmission Yoke & 1 3/4" Headers need to be installed...

I'd like to do some wide-band tuning prior to hitting the rollers too.

 

Sub'd

 

 

Well, I'm still in disbelief

I made substantially less power!

 

You dont need 110 oct and i can see that making less