Third Party Testing: Crawford Billet Power Blocks (BPB / Manifold Spacers)

[Boxer486]

The Perrin chart does seem to indicate some losses to me even with a better design and internal construction. The only way to know for sure is to dyno the same Perrin design in 2.7" versus 3.0". Even then it's not so simple as changing diameter might require a change in design as well to be optimal.

Gladly with the BPBs the lengthened runners behave as predicted with an increase and shift in the bands, so no real mystery here.

[Crawford Performance]

It's almost impossible to get these cars to lay down identical graphs from one run to the next. The ECU adds timing as it pleases so each run can and will be a little different. When you see a sharp dip in the graph, that is the ECU pulling timing. The graphs posted above use a smooth run compared to a run that is pulling timing, so they are not the best comparison of the component change.

During our testing, we do six runs for each change to get an average of what the change actually did. This gives us a better idea of what is actually going on and helps us to create components that supply the increase we advertise.

FYI, when looking at a dyno graph you should always look at the graph and try to ignore the numbers. We can make the numbers say anything we choose but we cannot change how the graph is composed as well as the percentage of difference between the two graphs.

Crawford Performance

[DriftHappens]

my fault, i missed the part about similar case! thanks for pointing it out.

Originally Posted by cslntuee

Yes, you are correct.

I wrote on my original post "I personal believe that Big TB is the similar case
as "intake pipe".

I think that will slow the air flow when the diameter is increase.(
I mean the intake pipe)

It should cause losing the torque in the low RPM. (It will help for high RPM
that I understand as you mentioned)

Thanks.

[Gshoxx]

No jdl headers, catback and bpb dyno yet mr. Nelsmar?

[nelsmar]

Originally Posted by Gshoxx

No jdl headers, catback and bpb dyno yet mr. Nelsmar?

I may or may not have a JDL header op and front pipe on the car ATM... Unfortunately we didn't make it to the dyno for tuning due to dyno schedule conflicts. So we only did street tuning I did however get 2-3 pulls to see where the car landed and am working on getting a 2.5" catback. And then possibly a few intakes. Currently the car peaks at 27% peak whp gain at about 6500rpm. But past 7k it dropped off and need lots of dyno love! I just swirched te car to ethanol a few days ago for testing and will be migrating back to 91 for tuning with catback hopefilly this week. We decided to turn it into a project and see if we can make 40-50%+ whp gain on e85 with full bolt ons. I was planning on a number of threads showing progress.

The only issue is I have a new engine to install in my car so that's holding me back a bit!

[major quicknap]

Originally Posted by nelsmar

The only issue is I have a new engine to install in my car

Minor detail.

[Gshoxx]

So to get full benifits of bpb you have to get a tune?

[Gshoxx]

Very interested on this product pls keep us updated... I have catback / op/ and waiting for my jdl uel headers. And already have a stage 2 tune.. How much gain do you think am looking at if i add this bpb on my mods? Plus do i need an upgraded tune if i add the bpb?

[Carlitoz3]

Sorry if this has already been answered;
What tools are needed for this mod?
Stopping by autozone later today to slap on these bad boys.
Thanks.

[Gilwith1l]

Originally Posted by Carlitoz3

Sorry if this has already been answered;
What tools are needed for this mod?
Stopping by autozone later today to slap on these bad boys.
Thanks.

10/12mm sockets . a socket extension about 12" long

[Gilwith1l]

A 10 mm wrench to loosen a bracket on the drivers side strut tower

[nelsmar]

Originally Posted by major quicknap

Minor detail.

The motor is for my personal car not the one in the dyno.

Originally Posted by Gshoxx

So to get full benifits of bpb you have to get a tune?

You will still get a nice fain without a tune. You will just get a significant difference at higher rpm as the power falls off without a tune. I highly recommend a tune as well.

Originally Posted by Gshoxx

Very interested on this product pls keep us updated... I have catback / op/ and waiting for my jdl uel headers. And already have a stage 2 tune.. How much gain do you think am looking at if i add this bpb on my mods? Plus do i need an upgraded tune if i add the bpb?

I am not quite sure what a stage 2 consists of (I just tune a car for what it has on it). It would be near to talk I your tuner. You will likely need a minor retune because of the increase in engine load in the mid range and decreased load up top. As for how much it adds with JDL header I will post dynos after I remove to see the actual difference. Both header and bpb create similar patterns of power dropping off at 7000.

[TouchMyHonda]

Originally Posted by Crawford Performance

It's almost impossible to get these cars to lay down identical graphs from one run to the next. The ECU adds timing as it pleases so each run can and will be a little different. When you see a sharp dip in the graph, that is the ECU pulling timing. The graphs posted above use a smooth run compared to a run that is pulling timing, so they are not the best comparison of the component change.

During our testing, we do six runs for each change to get an average of what the change actually did. This gives us a better idea of what is actually going on and helps us to create components that supply the increase we advertise.

FYI, when looking at a dyno graph you should always look at the graph and try to ignore the numbers. We can make the numbers say anything we choose but we cannot change how the graph is composed as well as the percentage of difference between the two graphs.

Crawford Performance

@Crawford Performance Can we please work on another group buy?

[Pixie_Niner]

My husband fitted the BPB to my car today. Couple of clearance issues with the Cusco Diagonal strut bars I have and a breather hose needing a better seal that just cable ties.

But other than that its all good. And what a difference they make, power delivery is very crisp. I have the perrin intake pipe and CAI and they work great together. The perrin stuff on its on made a great noise but didn't feel like much of a gain. But along with the BPBs it awesome.

And all of the above is without a tune!!!